Ultimate Arms Gear Pro Series Tactical Heavy Duty 1" Flashlight - Light - Laser Weaver / Picatinny Base Ring Mount Superior Heavy Duty Construction Of Precision Machined Aluminum Anodized Black Matte Finish Compact Mount Measures Approx. 2.1" Long That Works With Most Flashlights & Lasers That Have A 1" Tube Fits On Standard 7/8" Weaver - Picatinny Sized Rails - Great For Handguard Rails Also! Includes "QD" Quick Detach Locking Hex Nuts