Description PRODUCT DETAILAction: semi-auto Barrel: 16.125" Finish: Stainless Sights: Peep Sight Caliber: 223 Rem | 5.56 NATO Capacity: 20+1 Magazine: 2 20 rd. Rate Of Twist: 1-in-9" Stock Frame Grips: Synthetic Stock Black Synthetic Nfa Thread Pattern: 1/2x28 Additional Feature 1: Picatinny Rail Additional Feature 2: Includes Scope Rings Additional Feature 3: Factory Installed Flash Hider 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.