Ultimate Arms Gear Tactical Precision Machined Aluminum No Gunsmithing Weaver Picatinny Top & Bottom Rail Pistol Handgun Scope Mount for Sights , Lasers , Lights and Accessories Fits Smith & Wesson S&W 1911 M&P SD9 SD40 Pistols with Front Accessories Rail + Ultimate Arms Gear Tactical "CQB" Pistol Red-Green 4 Reticle Red Dot Open Reflex Sight/Scope