sch.4-sec.15Firearm, other than a pistol, with a calibre of .50 or less

sch.4-sec.15 Firearm, other than a pistol, with a calibre of .50 or less

A firearm that has a calibre of .50 or less, other than a pistol, may be modified to make it permanently incapable of being discharged by doing all of the following— in relation to the bolt— machining away 1 side of the bolt face with a 45 degree backward facing cut to allow enough remaining material to hold the firing pin, extractor and ejector; and ensuring the cut breaks through the side of the bolt; and removing at least 50% of the locking surface to a depth of at least 4mm; and shortening the firing pin so that it does not protrude beyond the bolt face; in relation to the barrel— machining away the chamber for at least 80% of its length, ensuring the cut— is of a width of at least 1/3 of the chamber’s diameter; or removes a section of the chamber, that is at least a 1/4 section of the chamber; and from the point where the barrel extends from the chamber, machining away at least 15mm of the barrel, ensuring the cut— is of a width of at least 1/3 of the barrel’s diameter; or removes at least a 1/4 section of the barrel; in relation to the gas system, if any— machining a flat surface along the length of the piston head, ensuring the cut removes at least 1/3 of the diameter of the piston head; and making a cut in the cylinder that is equal in width to the lesser of the following— 1/2 of the diameter of the inside cylinder for the distance of the piston travel; 10mm; and machining a slot to remove at least 1/2 of the diameter of the gas port for a distance of at least 1/2 of its length; in relation to the receiver— making a cut in the ring to match a cut in the chamber; and making another cut that removes at least 50% of the locking surface to a depth of at least 4mm (or, if there is a removable locking shoulder, through the locking shoulder and at least 4mm into the supporting material); and making a cut that removes the greater of the following— 50% of the left or right side of the receiver; an area of the left or right side of the receiver that is 35mm 2 ; and ensuring the cut mentioned in subparagraph (iii) is in the area of the locking surface or between the locking surface and the breech face (the cut does not need to be exposed); and if the firearm has an upper and a lower receiver— sectioning both receivers; and sectioning the hinge point on the lower receiver by removing a 1/4 section across it; and weakening the rear locking pin by machining away at least 50% of its cross section; in relation to the hammer, trigger and sear, either— machining a slot 2mm deep across the face of the hammer so that the hammer can not make contact with the firing pin; or weakening the trigger or the sear by making a cut of a minimum width of 5mm through 50% of its thickness or width; if the firearm is a belt-fed type—weakening the feed pawls and actuating arms by making a cut of at least 5mm through at least 50% of its thickness or width. sch 4 s 15 amd 2017 SL No. 117 s 23