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 M4 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 M4 profile stainless steel match-grade barrel has a 1 in 9" 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 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 a 1913 picatinny flattop rail. A Core 15 V.2 Hardcore Billet charging handle, M4-style thermoset molded polymer hand guards, and a chrome-lined 8620 steel bolt carrier ensure that your M4 Scout will operate safely and smoothly for years to come. A 30-round mil-spec GI aluminum magazine is included.