The Troy BattleMag is engineered to function with M4, M16/AR15, HK416 and FN SCAR rifles and carbines. An aggressive scale pattern provides a secure grip in dirty or wet conditions. A bolstered floor plate sits flush to prevent snagging when stacked or pulled. The reinforced feed lips and anti-tilt follower help prevent feed lips from spreading when kept loaded for extended periods. Made from Troy proprietary military-grade polymer and extensively tested by Special Ops units. Includes a flush and shock absorbing extended floor plate lock. Caliber 5.56.