German automaton adapted to the American modular system AR-15, created by Heckler & Koch. Despite the external similarity with the M4 carbine, the mechanism of the machine gun is actually closer to the German H &K G36, and not to the FC-samples of American rifles. Initially, the new weapon was supposed to be a replaceable module for installation on any trigger box from the M4 or M16, but later full-fledged submachine guns appeared.