The Amend2 10-round magazine is a sturdy reliable 5.56x45 NATO (.223 Remington) AR15/M4/M16 magazine made of advance polymer material. It is a light durable and excellent alternative to the standard M4/M16 USGI aluminum magazine. The magazine comes in a variety of colors including Black Flat Dark Earth OD Green and Gray.Sturdy Impact resistance polymer with textured gripAnti-tilt super followerHeavy duty non-memory and non-corrosive stainless steel springMade in the U.S.A.Material able to cerakote