The FGC-9 is a 9mm semi automatic firearm which can be made using a $200 3D printer, some hardware store bits, airsoft toy spare parts, and a length of steel tubing for a barrel. It also uses a printable Glock 17 30rd magazine.
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.
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.