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. RSR -