The M-11 was designed by Gordon Ingram of Military Armament Corporation during the 1970â€™s. Its core design was based on the open bolt MAC-10 which was larger in size and capable of firing a .45 ACP cartridge. The M11A1 by KWA is a gas powered submachine gun based on the smaller compact M-11 design set by Gordon Ingram. Similar to its real counterpart, the M11A1 fires from a true open bolt system. A sliding stock can extend out allowing users to remain stable while firing the weapon. Small and compact, the M11A1 provides users with a nimble light weapon with an extremely high rate of fire.