Guidance

Technical specifications for deactivated weapons (accessible)

Published 15 January 2025

General principles

General Principles	Guidance Notes
Prevent the disassembly of the firearms essential components by welding, bonding or by using appropriate measures with the equivalent degree of permanence.	Appropriate measures includes the use of blind pinning using a hardened steel pin.
Depending on national laws, this process can be performed after the checking of the National Authority.	Double submissions will be required in all cases where the certifying body cannot readily inspect the arm to ensure that all work has been carried out in compliance with the regulation.
Hardness of inserts: Deactivating entity has to ensure that pins/plugs/rods used have a hardness of at least 40 HRC and that material used for welding ensures a permanent and effective bond.	The hardness of pins, plugs and rods should be = 40 HRC prior to welding. The onus is on the submitter to ensure that the material sourced is of the correct hardness before welding it on the firearm. A sample of each should be supplied for retention by the Proof Authority as spot checks will be carried out by them and other official bodies.
Arms falling outside of the scope of the EU regulation should continue to be deactivated in accordance with ‘Specifications for the adaptation of shotgun magazines and the deactivation of firearms, revised 2010’.
Arms deactivated prior to the introduction of the regulation submitted for re-certification can still be issued with a UK valid only certificate. It must be noted that should the arm subsequently be sold, exported or fall within the remit of the regulation in any way, it must be brought up to the specification of the EU regulation.

Pistols

1	Pistols (single shot, semi-automatic)	Guidance Notes
	Prevent the disassembly of the firearms essential components by welding, bonding or by using appropriate measures with the equivalent degree of permanence.
1.1	Barrel: Cut a longitudinal slot through the barrel including the chamber where present (width: > ½ calibre; length: for rifled barrels three times the length of chamber and for smoothbore barrels twice the length of the chamber).
1.2	Barrel: For all pistols other than those with break action barrels a hole must be drilled across the chamber through both walls and through which a hardened steel pin must be inserted and securely welded (diameter > 50 % chamber, min 4,5 mm). The same pin can be used to secure the barrel to the action. Alternatively, a plug of the size of the cartridge case must be inserted into the chamber and securely welded.
1.3	Barrel: Remove the feed ramp where present.
1.4	Barrel: The barrel must be permanently secured to the firearm by welding, bonding or by using appropriate measures with the equivalent degree of permanence. The pin used in operation 1.2 can be used for this purpose.	In pistols where removal of the barrel requires the removal of the slide, this process may be achieved by the general provision of slide captivation.
1.5	Barrel: For exchange barrels not contained in a pistol, apply operations 1.1-1.4 and 1.19 as applicable. In addition, the barrels must be permanently prevented from being affixed to a firearm by cutting, welding, bonding or using appropriate measures with the equivalent degree of permanence.	Note - 1. 4 does not apply to exchange barrels. Exchange barrels for pistols may only be submitted as part of a factory set and not as individual barrels; they should be serial numbered accordingly. Details of the barrels submitted will be recorded on the deactivation certificate of the firearm they are  submitted with.
1.6	Breech block/bolt head: Remove or shorten firing pin.
1.7	Breech block/bolt head: Machine or remove the breech face at an angle of between 45 and 75 degrees as measured from the angle of the original face. Material must be removed across the entire breech face. All locking lugs must be removed or substantially weakened.
1.8	Breech block/bolt head: Weld the firing pin hole.
1.9	Slide: Machine or remove the breech face at an angle of between 45 and 75 degrees as measured from the angle of the original face. Material must be removed across the entire surface.
1.10	Slide: Remove the firing pin.	Remove or shorten the firing pin. If shortened, the firing pin tip must be at least 3mm below the deactivated breech face.
1.11	Slide: Remove locking lugs in slide.
1.12	Slide: Where applicable, machine the inside of the locking edge of the ejection port in the slide to an angle at a range of 45 to 75 degrees.	This applies to pistols such as Glock, SIG and H&K USP where the barrel locks into ejection port as opposed to lugs within the slide.
1.13	Slide: If the breech block can be taken off the slide body, the deactivated breech block has to be permanently fixed to the slide body.	This applies to pistols such as SIG P22X and the HK P9S where the breech block is a separate component.
1.14	Frame/Receiver: Remove feed ramp where present.
1.15	Frame/Receiver: Machine away at least 2/3 of the slide rails on both sides of the frame.
1.16	Trigger mechanism: Ensure destruction of the physical operating link between the trigger blade and the hammer, striker or sear. Fuse the trigger mechanism together with weld within receiver/frame, where applicable. If such fusion of the trigger mechanism is not possible, remove the trigger mechanism and fill the area with weld or epoxy resin.	As long as the physical link to the firing mechanism is destroyed, it is acceptable for the trigger blade and any external hammer be left free to move. However, they must be independent of each other and not linked in any way.
1.17	Trigger mechanism: The trigger mechanism and/or housing has to be welded to the receiver/frame (in case of steel frame) or glued to the receiver/frame with high temperature resistant glue (in case of light metal or polymer frame).	This applies to pistols such as the Tokarev or SIG 250 where the trigger mechanism is housed in a separate unit dropped into the frame.
1.18	Automatic system: Destroy the gas piston, gas pipe and gas port by cutting or welding.
1.19	Automatic system: If there is no gas piston, remove gas pipe. If the barrel is used as a gas piston, weld the deactivated barrel to the housing. In all cases where present, close the barrel’s gas vent by welding.
1.20	Magazines: Weld the magazine with spots or use appropriate measures with the equivalent degree of permanence, depending on type of arm and material to prevent removing the magazine.	The term magazine refers to detachable magazines only, NOT internal magazines such as those fitted to K98, etc…
1.21	Magazines: If the magazine is missing, place spots of weld or use appropriate measures in the magazine location or fix a lock to permanently prevent the insertion of a magazine.	It is acceptable to modify a magazine well by welding a substantial pin that would prevent the insertion of an unmodified magazine yet would allow an empty, slotted magazine to be fitted.
1.22	Silencer/Suppressor: Permanently prevent removal of the silencer/suppressor from the barrel by use of hardened steel pin or by welding, bonding or by using appropriate measures with the equivalent degree of permanence, if the silencer/suppressor is part of the weapon.
1.23	Silencer/Suppressor: Remove all the inner parts where possible and their attachment points of the moderator so that only a tube remains. Drill holes that are of a diameter larger than the calibre of the firearm and at a longitudinal interval of 3 cm (short firearms) or 5 cm (long firearms) through the casing and penetrating the expansion chamber. Or else cut a longitudinal slot of minimum 6 mm from rear end to front end through the casing and penetrating the expansion chamber.	Removal of the ‘inner parts’ would not apply to moderators where baffles are welded in place at manufacture.

Revolvers

2	Revolvers (including cylinder loading revolvers)	Guidance Notes
	Prevent the disassembly of the firearms essential components by welding, bonding or by using appropriate measures with the equivalent degree of permanence.
2.1	Barrel: Cut a longitudinal slot (width > ½ calibre; length: minimum ½ the length of the barrel from the forcing cone).
2.2	Barrel: A hole must be drilled through both walls of barrel (near the forcing cone) and through which a hardened steel pin must be inserted and securely welded (diameter > 50 % calibre, min 4,5 mm). The same pin can be used to secure the barrel to the action. As an alternative, securely weld a fitting hardened steel plug (length: minimum half length of the cylinder’s chamber), into the barrel starting at the cylinder side.
2.3	Barrel: The barrel must be permanently secured to the frame by welding, bonding or by using appropriate measures with the equivalent degree of permanence. The pin used in operation 2.2 can be used for this purpose.
2.4	Barrel: For exchange barrels not affixed to the firearm, apply operations 2.1-2.3 as applicable. In addition, the barrels must be permanently prevented from being affixed to a firearm by cutting, welding, bonding or using appropriate measures with the equivalent degree of permanence.	Note - 2.3 does not apply to exchange barrels. Exchange barrels for revolvers may only be submitted as part of a factory set and not as individual barrels; they should be serial numbered accordingly. Details of the barrels submitted will be recorded on the deactivation certificate of the firearm they are  submitted with.
2.5	Cylinder: Remove all internal walls from cylinder for a minimum of 2/3 of its length by machining. Remove as much of the internal walls from the cylinder as possible, ideally to the case diameter without breaching the external wall.
2.6	Cylinder: Where possible, weld to prevent the removal of the cylinder from the frame, or take appropriate measures such as pinning, that render the removal impossible.
2.7	Cylinder: For spare cylinders not affixed to a firearm, apply operation 2.5. In addition, the cylinder must be permanently prevented from being affixed to a firearm by cutting, welding, bonding or using appropriate measures with the equivalent degree of permanence.
2.8	Frame/Receiver: Extend firing pin hole to three times of its original size.
2.9	Frame/Receiver: Remove or shorten firing pin.
2.10	Trigger mechanism: Ensure destruction of the physical operating link between the trigger blade and the hammer, striker or sear. Fuse the trigger mechanism together with weld within receiver/frame, where applicable. If such fusion of the trigger mechanism is not possible, remove the trigger mechanism and fill the area with weld or epoxy resin.	As long as the physical link to the firing mechanism is destroyed, it is acceptable for the trigger blade and any external hammer be left free to move. However, they must be independent of each other and not linked in any way.
2.11	Trigger mechanism: The trigger mechanism and/or housing has to be welded to the receiver/frame (in case of steel frame) or glued to the receiver/frame with high temperature resistant glue (in case of light metal or polymer frame).
2.12	Silencer/Suppressor: Permanently prevent removal of the silencer/suppressor from the barrel by use of hardened steel pin or by welding, bonding or by using appropriate measures with the equivalent degree of permanence, if the silencer/suppressor is part of the weapon.
2.13	Silencer/Suppressor: Remove all the inner parts where possible and their attachment points of the moderator so that only a tube remains. Drill holes that are of a diameter larger than the calibre of the firearm and at a longitudinal interval of 3 cm (short firearms) or 5 cm (long firearms) through the casing and penetrating the expansion chamber. Or else cut a longitudinal slot of minimum 6 mm from rear end to front end through the casing and penetrating the expansion chamber.	Removal of the ‘inner parts’ would not apply to moderators where baffles are welded in place at manufacture.

Single shot long firearms

3	Single-shot long firearms (not break action)	Guidance Notes
	Prevent the disassembly of the firearms essential components by welding, bonding or by using appropriate measures with the equivalent degree of permanence.
3.1	Barrel: Cut a longitudinal slot through the barrel including the chamber where present (width: > ½ calibre; length: for rifled barrels three times the length of chamber and for smoothbore barrels twice the length of the chamber).
3.2	Barrel: A hole must be drilled across the chamber through both walls and through which a hardened steel pin must be inserted and securely welded (diameter > 50 % chamber, min 4,5 mm). The same pin can be used to secure the barrel to the action. Alternatively, a plug of the size of the cartridge case must be inserted into the chamber and securely welded.
3.3	Barrel: Remove the feed ramp where present.
3.4	Barrel: The barrel must be permanently secured to the firearm by welding, bonding or by using appropriate measures with the equivalent degree of permanence. The pin used in operation 3.2 can be used for this purpose.
3.5	Barrel: For exchange barrels not affixed to the firearm, apply operations 3.1-3.4 as applicable. In addition, the barrels must be permanently prevented from being affixed to a firearm by cutting, welding, bonding or using appropriate measures with the equivalent degree of permanence.	Note - 3.4 does not apply to exchange barrels.  Exchange barrels for single shot long firearms may only be submitted as part of a factory set and not as individual barrels; they should be serial numbered accordingly. Details of the barrels submitted will be recorded on the deactivation certificate of the firearm they are  submitted with.
3.6	Breech block/bolt head: Remove or shorten firing pin.
3.7	Breech block/bolt head: Machine or remove the breech face at an angle of between 45 and 75 degrees as measured from the angle of the original face. Material must be removed across the entire breech face. All locking lugs must be removed or substantially weakened.
3.8	Breech block/bolt head: Weld the firing pin hole.
3.9	Trigger mechanism: Ensure destruction of the physical operating link between the trigger blade and the hammer, striker or sear. Fuse the trigger mechanism together with weld within receiver/frame, where applicable. If such fusion of the trigger mechanism is not possible, remove the trigger mechanism and fill the area with weld or epoxy resin.	As long as the physical link to the firing mechanism is destroyed, it is acceptable for the trigger blade and any external hammer be left free to move. However, they must be independent of each other and not linked in any way.
3.10	Trigger mechanism: The trigger mechanism and/or housing has to be welded to the receiver/frame (in case of steel frame) or glued to the receiver/frame with high temperature resistant glue (in case of light metal or polymer frame).
3.11	Silencer/Suppressor: Permanently prevent removal of the silencer/suppressor from the barrel by use of hardened steel pin or by welding, bonding or by using appropriate measures with the equivalent degree of permanence, if the silencer/suppressor is part of the weapon.
3.12	Silencer/Suppressor: Remove all the inner parts where possible and their attachment points of the moderator so that only a tube remains. Drill holes that are of a diameter larger than the calibre of the firearm and at a longitudinal interval of 3 cm (short firearms) or 5 cm (long firearms) through the casing and penetrating the expansion chamber. Or else cut a longitudinal slot of minimum 6 mm from rear end to front end through the casing and penetrating the expansion chamber.	Removal of the ‘inner parts’ would not apply to moderators where baffles are welded in place at manufacture.

Break action

4	Break action firearms (e.g. smoothbore, rifled, combination, falling/rolling block action, short and long firearms)	Guidance Notes
	Prevent the disassembly of the firearms essential components by welding, bonding or by using appropriate measures with the equivalent degree of permanence.
4.1	Barrel: Cut a longitudinal slot through the barrel including the chamber where present (width: > ½ calibre; length: for rifled barrels three times the length of chamber and for smoothbore barrels twice the length of the chamber). For firearms without chamber included in the barrel, cut a longitudinal slot (width > ½ calibre; length: minimum ½ the length of the barrel from the forcing cone).
4.2	Barrel: A tight fitting plug of at least 2/3 length of the chamber is to be securely welded into the chamber and should be positioned as close to the breech as possible.
4.3	Barrel: Remove the feed ramp where present.
4.4	Barrel: The barrel must be permanently secured to the firearm by welding, bonding or by using appropriate measures with the equivalent degree of permanence.
4.5	Barrel: For exchange barrels not affixed to the firearm, apply operations 4.1-4.4 as applicable. In addition, the barrels must be permanently prevented from being affixed to a firearm by cutting, welding, bonding or using appropriate measures with the equivalent degree of permanence.	Note - 4.4 does not apply to exchange barrels. Exchange barrels for break action firearms may only be submitted as part of a factory set and not as individual barrels; they should be serial numbered accordingly. Details of the barrels submitted will be recorded on the deactivation certificate of the firearm they are  submitted with.
4.6	Trigger mechanism: Ensure destruction of the physical operating link between the trigger blade and the hammer, striker or sear. Fuse the trigger mechanism together with weld within receiver/frame, where applicable. If such fusion of the trigger mechanism is not possible, remove the trigger mechanism and fill the area with weld or epoxy resin.	As long as the physical link to the firing mechanism is destroyed, it is acceptable for the trigger blade and any external hammer be left free to move. However, they must be independent of each other and not linked in any way.
4.7	Trigger mechanism: The trigger mechanism and/or housing has to be welded to the receiver/frame (in case of steel frame) or glued to the receiver/frame with high temperature resistant glue (in case of light metal or polymer frame).
4.8	Action: Machine a cone of 60 degrees minimum (apex angle), in order to obtain a base diameter equal to 10 mm at least or the diameter of the breech face.
4.9	Action: Remove the firing pin, enlarge the firing pin hole at a minimum diameter of 5 mm and weld the firing pin hole.
4.10	Silencer/Suppressor: Permanently prevent removal of the silencer/suppressor from the barrel by use of hardened steel pin or by welding, bonding or by using appropriate measures with the equivalent degree of permanence, if the silencer/suppressor is part of the weapon.
4.11	Silencer/Suppressor: Remove all the inner parts where possible and their attachment points of the moderator so that only a tube remains. Drill holes that are of a diameter larger than the calibre of the firearm and at a longitudinal interval of 3 cm (short firearms) or 5 cm (long firearms) through the casing and penetrating the expansion chamber. Or else cut a longitudinal slot of minimum 6 mm from rear end to front end through the casing and penetrating the expansion chamber.	Removal of the ‘inner parts’ would not apply to moderators where baffles are welded in place at manufacture.

Repeating long firearms

5	Repeating long firearms (smoothbore, rifled)	Guidance Notes
	Prevent the disassembly of the firearms essential components by welding, bonding or by using appropriate measures with the equivalent degree of permanence.
5.1	Barrel: Cut a longitudinal slot through the barrel including the chamber where present (width: > ½ calibre; length: for rifled barrels three times the length of chamber and for smoothbore barrels twice the length of the chamber). For firearms without chamber included in the barrel, cut a longitudinal slot (width > ½ calibre; length: minimum ½ the length of the barrel from the forcing cone).
5.2	Barrel: A hole must be drilled across the chamber through both walls and through which a hardened steel pin must be inserted and securely welded (diameter > 50 % chamber, min 4,5 mm). The same pin can be used to secure the barrel to the action. Alternatively, a plug of the size of the cartridge case must be inserted into the chamber and securely welded.
5.3	Barrel: Remove the feed ramp where present.
5.4	Barrel: The barrel must be permanently secured to the firearm by welding, bonding or by using appropriate measures with the equivalent degree of permanence. The pin used in operation 5.2 can be used for this purpose.
5.5	Barrel: For exchange barrels not affixed to the firearm, apply operations 5.1-5.4 as applicable. In addition, the barrels must be permanently prevented from being affixed to a firearm by cutting, welding, bonding or using appropriate measures with the equivalent degree of permanence.	Note - 5.4 does not apply to exchange barrels. Exchange barrels for repeating long firearms may only be submitted as part of a factory set and not as individual barrels; they should be serial numbered accordingly. Details of the barrels submitted will be recorded on the deactivation certificate of the firearm they are  submitted with.
5.6	Breech block/bolt head: Remove or shorten firing pin.
5.7	Breech block/bolt head: Machine or remove the breech face at an angle of between 45 and 75 degrees as measured from the angle of the original face. Material must be removed across the entire breech face. All locking lugs must be removed or substantially weakened.
5.8	Breech block/bolt head: Weld the firing pin hole.
5.9	Trigger mechanism: Ensure destruction of the physical operating link between the trigger blade and the hammer, striker or sear. Fuse the trigger mechanism together with weld within receiver/frame, where applicable. If such fusion of the trigger mechanism is not possible, remove the trigger mechanism and fill the area with weld or epoxy resin.	As long as the physical link to the firing mechanism is destroyed, it is acceptable for the trigger blade and any external hammer be left free to move. However, they must be independent of each other and not linked in any way.
5.1	Trigger mechanism: The trigger mechanism and/or housing has to be welded to the receiver/frame (in case of steel frame) or glued to the receiver/frame with high temperature resistant glue (in case of light metal or polymer frame).
5.11	Magazines: Weld the magazine with spots or use appropriate measures with the equivalent degree of permanence, depending on type of arm and material to prevent removing the magazine.	The term magazine refers to detachable magazines only, NOT internal magazines such as those fitted to K98, etc…
5.12	Magazines: If the magazine is missing, place spots of weld or use appropriate measures in the magazine location or fix a lock to permanently prevent the insertion of a magazine.	It is acceptable to modify a magazine well by welding a substantial pin that would prevent the insertion of an unmodified magazine yet would allow an empty, slotted magazine to be fitted.
5.13	Magazines: For tube magazines, drive one or several hardened steel pin(s) through magazine, chamber and frame connecting them permanently to each other. Secure by welding.
5.14	Silencer/Suppressor: Permanently prevent removal of the silencer/suppressor from the barrel by use of hardened steel pin or by welding, bonding or by using appropriate measures with the equivalent degree of permanence, if the silencer/suppressor is part of the weapon.
5.15	Silencer/Suppressor: Remove all the inner parts where possible and their attachment points of the moderator so that only a tube remains. Drill holes that are of a diameter larger than the calibre of the firearm and at a longitudinal interval of 3 cm (short firearms) or 5 cm (long firearms) through the casing and penetrating the expansion chamber. Or else cut a longitudinal slot of minimum 6 mm from rear end to front end through the casing and penetrating the expansion chamber.	Removal of the ‘inner parts’ would not apply to moderators where baffles are welded in place at manufacture.

Semi auto long firearms

6	Semi-automatic long firearms (smoothbore, rifled)	Guidance Notes
	Prevent the disassembly of the firearms essential components by welding, bonding or by using appropriate measures with the equivalent degree of permanence.
6.1	Barrel: Cut a longitudinal slot through the barrel including the chamber where present (width: > ½ calibre; length: for rifled barrels three times the length of chamber and for smoothbore barrels twice the length of the chamber). For firearms without chamber included in the barrel, cut a longitudinal slot (width > ½ calibre; length: minimum ½ the length of the barrel from the forcing cone).
6.2	Barrel: A hole must be drilled across the chamber through both walls and through which a hardened steel pin must be inserted and securely welded (diameter > 50 % chamber, min 4,5 mm). The same pin can be used to secure the barrel to the action. Alternatively, a plug of the size of the cartridge case must be inserted into the chamber and securely welded.
6.3	Barrel: Remove the feed ramp where present.
6.4	Barrel: The barrel must be permanently secured to the firearm by welding, bonding or by using appropriate measures with the equivalent degree of permanence. The pin used in operation 6.2 can be used for this purpose.
6.5	Barrel: For exchange barrels not affixed to the firearm, apply operations 6.1-6.4 and 6.12 as applicable. In addition, the barrels must be permanently prevented from being affixed to a firearm by cutting, welding, bonding or using appropriate measures with the equivalent degree of permanence.	Note - 6.4 does not apply to exchange barrels. Exchange barrels for semi auto long firearms may only be submitted as part of a factory set and not as individual barrels; they should be serial numbered accordingly. Details of the barrels submitted will be recorded on the deactivation certificate of the firearm they are  submitted with.
6.6	Breech block/bolt head: Remove or shorten firing pin.
6.7	Breech block/bolt head: Machine or remove the breech face at an angle of between 45 and 75 degrees as measured from the angle of the original face. Material must be removed across the entire breech face. All locking lugs must be removed or substantially weakened.
6.8	Breech block/bolt head: Weld the firing pin hole.
6.9	Trigger mechanism: Ensure destruction of the physical operating link between the trigger blade and the hammer, striker or sear. Fuse the trigger mechanism together with weld within receiver/frame, where applicable. If such fusion of the trigger mechanism is not possible, remove the trigger mechanism and fill the area with weld or epoxy resin.	As long as the physical link to the firing mechanism is destroyed, it is acceptable for the trigger blade and any external hammer be left free to move. However, they must be independent of each other and not linked in any way.
6.10	Trigger mechanism: The trigger mechanism and/or housing has to be welded to the receiver/frame (in case of steel frame) or glued to the receiver/frame with high temperature resistant glue (in case of light metal or polymer frame).
6.11	Automatic system: Destroy the gas piston, gas pipe and gas port by cutting or welding.
6.12	Automatic system: If there is no gas piston, remove gas pipe. If the barrel is used as a gas piston, weld the deactivated barrel to the housing. In all cases where present, close the barrel’s gas vent by welding.
6.13	Automatic system: Machine or remove the breech face at an angle of between 45 and 75 degrees as measured from the angle of the original face. Material must be removed across the entire surface of the breech face and elsewhere so that bolt/breech block is reduced by minimum 50 % of original mass. Permanently fix the breech block to the firearm by welding; bonding or by using appropriate measures with the equivalent degree of permanence.	Remove all support on the breech face for the cartridge head. As long as the breech face is removed, the breech block mass is reduced by the required percentage and is permanently fixed in place, and the firing pin is removed or shortened, it is permissable for the cocking  handle to have independent movement. A de-natured, scrap fragment of the breech block separated from the bolt head and attached to the cocking handle may be left free to move back and forth behind the main deactivated and fixed breech block/bolt mass.
6.14	Automatic system: In cases where bolt heads are incorporated into a bolt carrier, the carrier must be reduced by a minimum of 50 %. The bolt head must be permanently fixed to the carrier and the carrier must be permanently fixed to the firearm by welding, bonding or by using appropriate measures with the equivalent degree of permanence.	Remove all support on the breech face for the cartridge head. As long as the breech face is removed, the breech block mass is reduced by the required percentage and is permanently fixed in place, and the firing pin is removed or shortened, it is permissable for the cocking  handle to have independent movement. A de-natured, scrap fragment of the breech block separated from the bolt head and attached to the cocking handle may be left free to move back and forth behind the main deactivated and fixed breech block/bolt mass.
6.15	Magazines: Weld the magazine with spots or use appropriate measures with the equivalent degree of permanence, depending on type of arm and material to prevent removing the magazine.	The term magazine refers to detachable magazines only, NOT internal magazines such as those fitted to K98, etc…
6.16	Magazines: If the magazine is missing, place spots of weld or use appropriate measures in the magazine location or fix a lock to permanently prevent the insertion of a magazine.	It is acceptable to modify a magazine well by welding a substantial pin that would prevent the insertion of an unmodified magazine yet would allow an empty, slotted magazine to be fitted.
6.17	Magazines: For tube magazines, drive one or several hardened steel pin(s) through magazine, chamber and frame connecting them permanently to each other. Secure by welding.
6.18	Silencer/Suppressor: Permanently prevent removal of the silencer/suppressor from the barrel by use of hardened steel pin or by welding, bonding or by using appropriate measures with the equivalent degree of permanence, if the silencer/suppressor is part of the weapon.
6.19	Silencer/Suppressor: Remove all the inner parts where possible and their attachment points of the moderator so that only a tube remains. Drill holes that are of a diameter larger than the calibre of the firearm and at a longitudinal interval of 3 cm (short firearms) or 5 cm (long firearms) through the casing and penetrating the expansion chamber. Or else cut a longitudinal slot of minimum 6 mm from rear end to front end through the casing and penetrating the expansion chamber.	Removal of the ‘inner parts’ would not apply to moderators where baffles are welded in place at manufacture.

Automatic firearms

7	Automatic firearms: e.g. assault rifles, (sub)machine guns, automatic pistols	Guidance Notes
	Prevent the disassembly of the firearms essential components by welding, bonding or by using appropriate measures with the equivalent degree of permanence.
7.1	Barrel: Cut a longitudinal slot through the barrel including the chamber where present (width: > ½ calibre; length: for rifled barrels three times the length of chamber and for smoothbore barrels twice the length of the chamber).
7.2	Barrel: A hole must be drilled across the chamber through both walls and through which a hardened steel pin must be inserted and securely welded (diameter > 50 % chamber, min 4,5 mm). The same pin can be used to secure the barrel to the action. Alternatively, a plug of the size of the cartridge case must be inserted into the chamber and securely welded.
7.3	Barrel: Remove the feed ramp where present.
7.4	Barrel: The barrel must be permanently secured to the firearm by welding, bonding or by using appropriate measures with the equivalent degree of permanence. The pin used in operation 7.2 can be used for this purpose.	In automatic pistols where removal of the barrel requires the removal of the slide, this process may be achieved by the general provision of slide captivation.
7.5	Barrel: For exchange barrels not affixed to the firearm, apply operations 7.1-7.3 as applicable. In addition, the barrels must be permanently prevented from being affixed to a firearm by cutting, welding, bonding or using appropriate measures with the equivalent degree of permanence.	Exchange barrels for automatic pistols may only be submitted as part of a factory set and not as individual barrels; they should be serial numbered accordingly. Details of the barrels submitted will be recorded on the deactivation certificate of the firearm they are  submitted with. With the exception of barrels for crew-served firearms, barrels for other automatic firearms may not be submitted. Crew-served firearm barrels may be submitted as part of a set (as discussed above) or as separate/individual barrels. Where submitted separately, such individual barrels will be issued with their own deactivation certificate. All barrels submitted as exchange barrels must have a clear and permanent serial number.
7.6	Breech block/bolt head: Remove or shorten firing pin.
7.7	Breech block/bolt head: Machine or remove the breech face at an angle of between 45 and 75 degrees as measured from the angle of the original face. Material must be removed across the entire breech face. All locking lugs must be removed or substantially weakened.
7.8	Breech block/bolt head: Weld the firing pin hole.
7.9	Slide (for automatic pistols): Machine or remove the breech face at an angle of between 45 and 75 degrees as measured from the angle of the original face. Material must be removed across the entire surface.
7.10	Slide (for automatic pistols): Remove the firing pin.
7.11	Slide (for automatic pistols): Remove locking lugs in slide.
7.12	Slide (for automatic pistols): Where applicable, machine the inside of the locking edge of the ejection port in the slide to an angle at a range of 45 to 75 degrees.	This applies to pistols such as Glock 18 where the barrel locks into ejection port as opposed to lugs within the slide
7.13	Slide (for automatic pistols): If the breech block can be taken off the slide body, the deactivated breech block has to be permanently fixed to the slide body.	This applies to pistols such as Glock, SIG and H&K USP where the barrel locks into ejection port as opposed to lugs within the slide.
7.14	Frame/Receiver (for automatic pistols): Remove feed ramp where present.
7.15	Frame/Receiver (for automatic pistols): Machine away at least 2/3 of the slide rails on both sides of the frame.
7.16	Trigger mechanism: Ensure destruction of the physical operating link between the trigger blade and the hammer, striker or sear. Fuse the trigger mechanism together with weld within receiver/frame, where applicable. If such fusion of the trigger mechanism is not possible, remove the trigger mechanism and fill the area with weld or epoxy resin.	As long as the physical link to the firing mechanism is destroyed, it is acceptable for the trigger blade and any external hammer be left free to move. However, they must be independent of each other and not linked in any way.
7.17	Trigger mechanism: The trigger mechanism and/or housing has to be welded to the receiver/frame (in case of steel frame) or glued to the receiver/frame with high temperature resistant glue (in case of light metal or polymer frame).
7.18	Automatic system: Destroy the gas piston, gas pipe and gas port by cutting or welding.
7.19	Automatic system: If there is no gas piston, remove gas pipe. If the barrel is used as a gas piston, weld the deactivated barrel to the housing. In all cases where present, close the barrel’s gas vent by welding.
7.20	Automatic system: Machine or remove the breech face at an angle of between 45 and 75 degrees as measured from the angle of the original face. Material must be removed across the entire surface of the breech face and elsewhere so that bolt/breech block is reduced by minimum 50 % of original mass. Permanently fix the breech block to the firearm by welding; bonding or by using appropriate measures with the equivalent degree of permanence.	Remove all support on the breech face for the cartridge head. As long as the breech face is removed, the breech block mass is reduced by the required percentage and is permanently fixed in place, and the firing pin is removed or shortened, it is permissable for the cocking  handle to have independent movement. A de-natured, scrap fragment of the breech block separated from the bolt head and attached to the cocking handle may be left free to move back and forth behind the main deactivated and fixed breech block/bolt mass.
7.21	Automatic system: In cases where bolt heads are incorporated into a bolt carrier, the carrier must be reduced by a minimum of 50 %. The bolt head must be permanently fixed to the carrier and the carrier must be permanently fixed to the firearm by welding, bonding or by using appropriate measures with the equivalent degree of permanence.	Remove all support on the breech face for the cartridge head. As long as the breech face is removed, the breech block mass is reduced by the required percentage and is permanently fixed in place, and the firing pin is removed or shortened, it is permissable for the cocking  handle to have independent movement. A de-natured, scrap fragment of the breech block separated from the bolt head and attached to the cocking handle may be left free to move back and forth behind the main deactivated and fixed breech block/bolt mass.
7.22	Magazines: Weld the magazine with spots or use appropriate measures with the equivalent degree of permanence, depending on type of arm and material to prevent removing the magazine.	The term magazine refers to detachable magazines only, NOT internal magazines such as those fitted to K98, etc…
7.23	Magazines: If the magazine is missing, place spots of weld or use appropriate measures in the magazine location or fix a lock to permanently prevent the insertion of a magazine.	It is acceptable to modify a magazine well by welding a substantial pin that would prevent the insertion of an unmodified magazine yet would allow an empty, slotted magazine to be fitted.
7.24	Magazines: For tube magazines, drive one or several hardened steel pin(s) through magazine, chamber and frame connecting them permanently to each other. Secure by welding.
7.25	Silencer/Suppressor: Permanently prevent removal of the silencer/suppressor from the barrel by use of hardened steel pin or by welding, bonding or by using appropriate measures with the equivalent degree of permanence, if the silencer/suppressor is part of the weapon.
7.26	Silencer/Suppressor: Remove all the inner parts where possible and their attachment points of the moderator so that only a tube remains. Drill holes that are of a diameter larger than the calibre of the firearm and at a longitudinal interval of 3 cm (short firearms) or 5 cm (long firearms) through the casing and penetrating the expansion chamber. Or else cut a longitudinal slot of minimum 6 mm from rear end to front end through the casing and penetrating the expansion chamber.	Removal of the ‘inner parts’ would not apply to moderators where baffles are welded in place at manufacture.

Muzzle loading firearms

8	muzzle loading firearms including break action (except cylinder loading revolvers)	Guidance Notes
	Prevent the disassembly of the firearms essential components by welding, bonding or by using appropriate measures with the equivalent degree of permanence.
8.1	Barrel: Cut a longitudinal slot through the barrel including the combustion chamber where present (width: > ½ calibre; length: three times the bullet diameter). For firearms without combustion chamber included in the barrel, cut a longitudinal slot (width > ½ calibre; length: minimum ½ the length of the barrel from the forcing cone).
8.2	Barrel: For firearms with combustion chamber included in the barrel, a hole must be drilled across the combustion chamber through both walls and through which a hardened steel pin must be inserted and securely welded (diameter > 50 % chamber, min 4,5 mm). The same pin can be used to secure the barrel to the action. For firearms without combustion chamber included in the barrel, securely weld a fitting hardened steel plug (length: minimum two times the length of bullet diameter), into the barrel from the forcing cone.
8.3	Barrel: For exchange barrels not affixed to the firearm, apply operations 8.1-8.2 as applicable. In addition, the barrels must be permanently prevented from being affixed to a firearm by cutting, welding, bonding or using appropriate measures with the equivalent degree of permanence.
8.4	In case of break action: Machine a cone of 60 degrees minimum (apex angle), in order to obtain a base diameter equal to 10 mm at least or the diameter of the breech face.
8.5	In case of break action: Remove the firing pin, enlarge the firing pin hole at a minimum diameter of 5 mm and weld the firing pin hole.
8.6	Trigger mechanism: Ensure destruction of the physical operating link between the trigger blade and the hammer, striker or sear. Fuse the trigger mechanism together with weld within receiver/frame, where applicable. If such fusion of the trigger mechanism is not possible, remove the trigger mechanism and fill the area with weld or epoxy resin.	As long as the physical link to the firing mechanism is destroyed, it is acceptable for the trigger blade and any external hammer be left free to move. However, they must be independent of each other and not linked in any way.
8.7	Trigger mechanism: The trigger mechanism and/or housing has to be welded to the receiver/frame (in case of steel frame) or glued to the receiver/frame with high temperature resistant glue (in case of light metal or polymer frame)
8.8	Nipples/holes: Remove or weld the nipple(s), weld the hole(s).
8.9	Separate (multiple) combustion chambers (except cylinder): For firearms with separate or multiple combustion chambers, remove internal wall(s) from the combustion chamber(s) for a minimum of 2/3 of its length by machining. Remove as much of the internal wall(s) as possible, ideally equal to the calibre diameter.