Colt AR-15 Magazines offer quality and reliability you can count on. This is the factory magazine used and supplied by Colt, but please note it may or may not be marked as Colt on the magazine itself. Featuring durable, lightweight aluminum construction with reliable steel spring internals. The 20-round magazines combine a compact size with solid capacity-offering the best of both worlds for AR-15 shooters. The 30 round option offers the standard capacity for loads of shooting fun. FeaturesLightweight Aluminum bodyCompatible with other platforms which utilize AR-15 style magazinesMay not be marked with the Colt brand, but these are the factory Colt magazines used and supplied by Colt