Ultimate Arms Gear Colt 1911 Series 70 Pistol Handgun Trigger Guard Mount Weaver Picatinny Rail Adapter for Scope, Sights, Lasers, Lights & Accessories Constructed from Precision Machined Aircraft Grade Aluminum Alloy. The Mount Clamps Securely onto the Trigger Guard. Specifications: Length: 3.3" Inches. Weight: 1.4 oz. Easy to Install , No Gunsmitthing Required. Set Screws Lock Tight to Existing Trigger Guard. Designed to Fit the Colt 1911 Series 70 and Some Similar Models.