The AR-STONER(TM) AR-15 Magazine features a stronger Stainless Steel Body for longer service life and greater resistance to damage than the traditional, aluminum bodied AR-15 magazine. The Enhanced Anti-Tilt Follower and Chrome Silicon Spring contribute to reliable feeding, even after long term storage fully loaded or prolonged use. Made in the USA to Military Specifications, the AR-STONER(TM) AR-15 Magazine can be counted on to perform reliably at the range, in competition, or in the field. FeaturesStainless Steel BodyPolymer Anti-Tilt FollowerChrome Silicon Spring