Features:Directly descended from the rifles developed by LWRCI to meet the requirements of the U.S. Army?s Individual Carbine Program. MonoForge Upper Receiver with integrated rail-base is lighter and stronger than standard pattern uppers. 3.5 in Freefloat Rail LWRCI? Enhanced Fire Control Group- Nickel Teflon coated for a smooth crisp trigger pull with positive reset. Fully Ambidextrous controls: fire/safety-control bolt catch release magazine release and Charging-Handle. Oversized LWRCI Enhanced Trigger Guard allows for operation with gloved hands. Chamber Ring Delayed Blowback Operating System. Coined Forging are struck heat-treated and struck again for precise dimensional accuracy and superior surface finish. LWRCI Ultra Combat Grip 27 Round OEM Glock Magazine