Amend2 Magazine, 223 Remington/556NATO, 10 Rounds, 30 Round Body Style, Fits AR Rifles, Polymer Construction, Black 556MOD2B1030 The Amend2 10-round magazine is a sturdy" reliable 5.56x45 NATO (.223 Remington) AR15/M4/M16 magazine made of an advanced polymer material. It is a light" durable" and excellent alternative to the standard M4/M16 USGI aluminum magazine. The 10-round body profile is ideal for hunting" bench shooting" or the various states where capacities are limited by law.