AR-15 .223 Aluminum 30 Round, Black Marlube, Orange Follower ASC manufactures an American classic that transcends the industry standard with the use of cutting edge robotic manufacturing technology and commitment to construct magazines with only the highest quality materials. Lightweight aluminum magazines are manufactured 100% start to finish in the USA using 6061 T0 grade aluminum, heat treated to a condition of T6, and hard coat anodized per MIL-A-8625 Type III class I for ultimate longevity. Proprietary coating, a high grade Marlube in Black which is a wear-in, not wear-off, coating that burnishes in the surface providing self-lubricating properties. Your number 1 choice for reliability, durability and superiority! Description: .223 Aluminum 30 Round Black Marlube Orange Anti-Tilt Follower Chrome Silicon Springs Mil Spec Polymer Followers 6061 Aluminum Floor plate Hard-coat Anodized Black