ADAMS ARMS®UNITED SPORTING COMPANIES EXCLUSIVETACTICAL PISTOL 5.56 11.5"•Tactical Battle-Ready Model •Pistol-length Gas System •Picatinny Railed Gas Block •Ambidextrous Safety Selector & Charging Handle •Standard GI Trigger •Government barrel contour •Threaded muzzle 1/2"-28 TPI •A2 Flash Hider •Twist Rate: 1 in 7" •7" Extended Quad Rail System •A2 Type Pistol Grip •KAK Shockwave Blade Pistol Stabilizing Brace P SERIESSHARED FEATURES•Short-Stroke Free-Floating Self-Cleaning Piston System •0.750" Diameter Gas Block with Adjustable Gas Settings •Full-Auto Rated 1-Pc Bolt Carrier with Integral Piston Strike Face •Type III Class 3 Hard-Coat Anodized 7075-T6 Aluminum Receivers •1913 Picatinny Flat-Top Upper with Dry Lube Internal Finish & Laser Engraved T-Markings •MIL-SPEC Lower Features Beveled Magwell & Machined Chevrons in Front Strap •4150 CMV Steel Barrel Threaded •QPQ Melonite/Black Nitride Barrel Finish •M4 Feed Ramps •Lifetime Warranty