This is a Mission First Tactical Classic RMG React Magwell Grip Black Polymer. The React Magwell Grip allows for close hold application at the low ready or in CQB situations. Pressure pad wells allow accessory activation by both RH and LH operators. Secure watertight storage compartment. Will not interfere with magazine. Designed for M16/M4/AR15/HK416. Constructed with a unique DuPont military grade polymer.