Ledsniper&reg;universal Tactical Pistol Scope Laser Flashlight Adapter Rail Mount Weaver M47 Constructed from Precision Machined Aircraft Grade Aluminum Alloy. Fits on Most Pistol Accessory Rails to Provide a Solid Weaver Style Platform for Most Optics. Provides A Standard 7/8" 12 Slot Top See-Thru Designed Weaver & 3 Slot Bottom Weaver - Picatinny Rail For Attaching Scopes, Sights, light, lasers etc. Specifications: Length 5" inches. Weight 3 oz. Easy to Install , No Gunsmitthing Required. 2 Set Screws Lock Tight to Existing Rail. Fits Pistols with Front Accessorie Rail