A homemade copy of the MAC-11 seized on Monday by police in Sorocaba, Sao Paulo. On this example an original factory-made barrel has possibly been used.
Since drafting this Ontario police have arrested and charged multiple individuals involved in the manufacture and distribution of handguns assembled in an identical manor, likely being the source of the examples below.
A firearm seized from a male suspect on 28th August in the city of Mississauga, Ontario CA appears at first glance to be conventional though is in fact illicitly manufactured from a combination of non-firearm parts. The body of the weapon including the frame (receiver) and trigger mechanism is that of a common gas powered replica Colt 1911 6mm airsoft / .177 BB pistol which is manufactured in Taiwan. The ‘F’ within a pentagon mark present on the frame indicates a muzzle energy not exceeding 7.5 J (5.5 ft⋅lbf) usually added in accordance with German law. This appears to have been combined with a conventional .22lr slide which is branded with a Blue Line Solutions logo and made in Germany, likely by GSG (German Sports Guns). All parts required in this case are available as conversions kits from the likes of GSG and others which usually include the slide, barrel and magazine, ready to drop onto an unmodified full-bore 1911 pistol frame assembly to allow the use of smaller .22lr cartridges. In this case very little modification is required to the airsoft frame to allow the .22lr conversion parts to function, the results having been documented by in videos and forum posts the past.
A number of identical conversions have been recently seized by Toronto Police:
The example below was seized in June:
Other examples seized this year:
Below: The result of a successful test firing of an identical conversion demonstrated in a video posted to Youtube:
A compact homemade submachine gun / machine pistol seized in Chilean city of San Barnardo in September 2018 which shows influence from both the MAC-11 and Micro UZI. This model does not appear to make use a telescoping bolt thus severe muzzle rise is to be expected.
A quick and dirty improvised firearm assembled using pipe fittings available at any hardware store. Ammunition in this case has been improvised using nail gun charges with the crimp removed and a lead projectile inserted. The weapon functions by pulling back the ball end of the spring loaded striker bar and releasing to fire.