The goal of the Industry Day was to review current carbine technology prior to writing formal requirements for a future replacement for the M4 carbine. The Barrett Enhanced Bolt is made from high-strength 9310 steel. The bolt is designed specifically for use in the piston operated REC7, not just adapted from a direct gas bolt. The bolt’s gas-ring-free design is easy to clean. Reinforced at critical areas, every bolt is proofed and magnetic-particle inspected to guarantee reliable performance. At the heart of the operating system is a nitrided, two-position, forward-venting gas plug that retains the piston. The piston can be accessed through the front of the gas block without removing the handguard so optical sights or laser devices do not need to be zeroed after routine maintenance. The REC7 rifle’s forged 7075 aluminum upper and lower receivers are Type 3 hardcoat anodized. The lower houses an ultra-dependable single-stage trigger. The upper supports a free-floated, hammer-forged, chrome-lined barrel with M4 feed ramps machined into the receiver and the barrel extension. A mil-spec A2 flash hider protects the muzzle. See also List of assault rifles References External links Barrett Firearms Model REC7 Barrett firearms 5.56 mm assault rifles Short stroke piston firearms Rifles of the United States ArmaLite AR-10 derivatives AR-15 style rifles 6.8mm firearms