The B&T APC (Advanced Police Carbine) is a family of firearms produced and manufactured by B&T of Switzerland. Announced in 2011, the submachine gun series uses 9x19mm, .40 S&W (APC40), 10mm Auto (APC10) and .45 ACP ammunition. The series was designed in the 2000s as a modern submachine gun that would be cheaper to produce. The APC9K is a shortened barrel variant of the APC9 which is the basic model and adopts a polymer receiver, magazine, and folding stock. It can be loaded with either 15-,20-,25-, or 30-round magazines. This model along with other variants of the APC are currently used in the U.S among personal security and police departments.