1911 Plastic Floor Plate .45 ACP 8rd high capacity magazines from Mec-gar. New Anti-Friction Coating. Black finish. Features redesigned plastic butt-plate and new follower. Fits Colt, Kimber, Springfield, S&W, Sig GSR and other 1911 style manufactured pistols. Constructed from certified carbon steel and features a heat treated housing and high-impact polymer follower and floorplate. The magazine spring is made of high strength type "D" music wire-the strongest wire available. TIG welding provides additional strength and a seamless finish. Each magazine surface is specially treated to ensure high corrosion resistance.