The Colt 9mm SMG is a Submachine Gun based on the M16 weapons platform. The weapon is blowback operated rather than the conventional gas operated of the M16/M4 series rifles. The magazine well of the receiver is modified using a special adaptor to allow the usage of smaller 9mm magazines. Colts Manufacturing Company (CMC--formerly Colts Patent Firearms Manufacturing Company) is a United States firearms manufacturer founded in 1847. ... A machine pistol shares several properties of the semi-automatic handgun and the sub-machine gun. ... The word calibre (British English) or caliber (American English) designates the interior diameter of a tube or the exterior diameter of a wire or rod. ... ball and hollowpoint 9mm Luger rounds are popular handgun ammunition. ... Rate of fire is the speed at which a specific firearm or artillery piece can ]] per minute (RPM or round/min), or rounds per second Note that heat and ammunition concerns mean that most automatic weapons are unlikely ever to sustain their cyclic rate of fire for a full minute... A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ... Ball and hollowpoint 9mm Luger rounds are popular handgun ammunition. ... Blowback is a system in which automatic or semi-automatic firearms operate through the energy created by combustion in the chamber and bore acting directly on the bolt face through the cartridge. ... Gas-operated firearm. ...