An extremely crude homemade .380 ACP submachine gun design adopted by illicit gun makers in Brazil. Most feature the use of barrels and bolts made from brass bar for ease of cutting drilling. The mag catch is usually nothing more than a nut and bolt. A large number of similar weapons were being made in a factory raided back in 2016, with such guns being traded through a WhatsApp group for the equivalent of 1000 USD.
Typical locally made firearms from Mindanao in the southern Philippines. Magazine fed bolt action combat shotguns as well as revolvers chambered in 5.56 have long been produced by local gunsmiths and are still seen turning up today.
Simple hardware store zip guns seized by police in Kazakhstan. With this design a finger is used to flip the bolt out of its slot to fire, in place of a typical trigger. Nail gun blank power charges combined with an airgun pellet serve as an improvised ammunition substitute.
The FGC9 is a 9mm semi-automatic pistol / carbine designed to be 3D printed and combined with some metal components including steel tubing and bar stock easily ordered worldwide. It is currently being developed by Deterrence Dispensed.
The DIY barrel on the FGC9 is made from steel tube which is rifled using an extremely simple DIY take on ECM (Electrochemical Machining) using salt water and electricity combined with a 3D printed spiral insert.