By exceeding military standards, Core Systems ensures the best fit possible and can offer a more reliable, smoother functioning, and more accurate weapon that will provide you with the peace of mind that you deserve. The Core 15 Keymod Scout has a direct gas-impingement system with a gas tube made of 304 grade stainless steel for longevity and tactical performance. The 16" 4150 mid-length profile stainless steel match-grade barrel has a 1 in 7" twist and an A2 flash hider. The upper and lower receivers are constructed from mil-spec forged 7075-T6 aluminum and the stock is a Core15 six-position retractable model with an A2 pistol grip. The Core15 Keymod 12.5” rail system provides a platform for a practically endless number of accessories. The lower receiver has a beveled magwell for improved reloading speed, machined chevrons in the front strap, and bullet pictogram safety markings. The upper receiver has M4 feed ramps and an M1913 picatinny flattop rail. The bolt carrier system features a mil-spec Carpenter 158 steel bolt, an M16 chrome-lined 8620 steel carrier, a tool steel extractor, and a mil-spec staked gas key. V.1 hardcore billet charging handle. Oversized trigger guard. Mission First Tactical 30-round magazine.