UTG 120lumen Sub-compact LED Pistol Light,16mm Head,QD Mount UTG Unique Reflector, Circuit Board, & Best in Class with Compact CREE R2 LED; 120 Max Lumens, 1+ Hour Operating Time at Max Brightness with Only 1x CR2 Lithium Battery Anti-sliding Posi-tab in Mount Base with 3.6mm Width/1.6mm Height to Prevent Movement Ambidextrous Finger Adjustable On/Off Switch; Complete with Integral Max Strength Picatinny/Weaver Style Mounting Deck with QD Cam Lever and Spring Tension Control; Hard Anodized Finish for Wear Resistance