Submachine guns such as the M3 grease gun and the Thompson served our military troops well in World War II and Korea. Fast forward M4 carbines have been the main service weapons.
Recently, the U.S. Army have decided to contract the Swiss defense contractor (Brugger and Thomet) $2.5 million dollars for the new APC9K submachine gun. There are 350 guns in the books as purchased with option to another thousand.
The U.S. Army have been looking for something to replace the Heckler & Koch 9mm MP5. Decisions was based on arming certain personnel that would needed something more small and maneuverable but with greater lethality than a pistol while operating in tight conditions than a rifle or carbine.
Other big manufactures such as Beretta, Colt, Heckler & Koch, and SIG Sauer have competed for this contract, until Brugger and Thomet won the contract.
The APC9K features a four-position Picatinny rail system on the barrel shroud, which is used for attaching accessories such as optical sights, laser aiming devices, illumination devices, and foregrips. It also features a set of fold-down iron aiming sights as backups in case the red dot sight fails. The controls are fully ambidextrous, with left and right-sided safeties, magazine release, and bolt release controls. The APC9k can also mount suppressors for quieter operation.
The APC9K is currently being used by the EKO Cobra, a counter terrorism unit in Austria. The APC9K is a blowback select fire submachine gun that has a cyclic rate of 1,080 rounds a minute. A semi-automatic version of the weapon with a longer barrel is also available, potentially for civilian sales in the future.