Ultimate Arms Gear Tactical Rifle Barrel Weaver Picatinny Flashlight Light Laser Mount w/ QD Scope Ring - Mount For AR15, AR-15, M4,M-4, M16, M-16 AR10 AR-10 .223 5.56 .308 Carbine Rifle Precision Machined Aircraft Grade Aluminum Construction w/ Anodized Matte Black Finish. Built Tough for Extreme Conditions. Mount Features a 7/8" Weaver Mount For Accessory Attachment. 21mm Width Scope Ring Works w/ Scopes, Red Dot Sights and Tactical Flashlights w/ 1" Main Tube. Scope Ring Features a QD Thumbnut Screw for Tactical Options.