B&T Advanced Police Carbine / APC submachine gun is a simple blowback operated weapon, firing from closed bolt. It is available in two versions, selective-fired and semi-auto only. In either version, it has a hammer-fired ignition system. Safety / fire selector switches are of ambidextrous design, and conveniently located at the top of the pistol grip. Selective-fired APC submachine guns have three position levers (Safe – Semi – Auto) while semi-automatic carbines have two-position levers (Safe – Fire). One interesting aspect of the semi-auto APC is that it uses AR15-style trigger unit, which will accept many after-market replacement parts. All other controls, such as bolt hold-open release button and magazine catch button, also are duplicated on either side of the gun for ambidextrous use, and charging handle can be installed on either side of the bolt, according to user preferences. Construction of the B&T APC submachine gun involves modern materials, such as aerospace-grade alloy for upper receiver and polymers for lower receiver / pistol grip, magazines and shoulder stock. B&T APC submachine gun is designed to handle most, if not all types of factory ammunition in its respective caliber, feeding from double stack, double feed magazines of various capacities, originally developed for B&T MP9 or MP45 submachine guns. All B&T APC submachine guns come with 3-lug barrels which would accept quick-detachable sound suppressors ('silencers'), also developed by B&T.
