The Stoner LMG is a light machine gun system developed by Eugene Stoner and manufactured by Knight's Armament Company (KAC). It is also known as the KAC Stoner 99 LMG to differentiate it from the earlier ArmaLite Stoner 63 LMG and Ares Stoner 86 LMG it is derived from.The Stoner LMG is billed by KAC as the lightest 5.56mm machine gun. It weighs 10 pounds with magazine and has a length of 35.25 inches.