The CE P12 is a selective fire submachine gun designed and manufactured by Costello Enterprises Munitions in Lovia. It is of an innovative design, making it more lightweight, maneuverable and versatile than most submachine guns, yet it fires rifle rounds. It uses the KA 5.56×45mm cartridge manufactured by Kameron Armaments, but is also compatible with 5.56×45mm NATO and .223 Remington cartridges.