captain-price-official:ArmaLite AR-100Gas operated, rotating bolt; 5.56x45mm NATO from a 30-round ma
captain-price-official:ArmaLite AR-100Gas operated, rotating bolt; 5.56x45mm NATO from a 30-round magazine or 100-round drum at 580 rpmUSAThe ArmaLite AR-100 was a series of assault rifles sold by ArmaLite and derived from the AR-18. It was never adopted, but it did lead Singapore to develop the Ultimax 100. The weapon was intended to increase firepower of a squad as well as mobility. The ArmaLite AR100 is a gas operated, 5.56x45mm NATO assault rifle platform fed from 30 round and 100 round drum magazines. Components are interchangable with all weapons with the bolt automatically turns firing pin modes when changed from a closed bolt to open bolt platform. The 100 round drum magazines eject from the magazine insert when empty and discarded during a firefight. -- source link