Description Mid-Length gas system with lightweight profile barrel. Enhanced flash hider. Ambidextrous safety selector lever. Ambidextrous magazine release. Ambidextrous bolt release. 6-position CAR stock. Eighteen inch 4140 steel barrel with 1 in 10 inch 5R rifling. Receiver material: 7075-T6 aluminum with black Type III hard anodized finish. Chromed gas key, bolt carrier and firing pin. 6.15 pound trigger pull. Made in the USA.Specifications:Barrel Length: 18Caliber-Gauge: .308 WIN.Capacity: 20Long Gun Web Model: M&P 10Made in the USASpecific Caliber: .308/7.62x51NATOTactical Firearms, trailers, and some accessories are only available for purchase in stores. Each location follows all BATF and individual state/county/city laws to insure the desired product is legal for sale. Any info provided online is subject to change, please go to your local store for more accurate information.