Stainless steel steel 7-round KimPro Tac-Mag for 1911 .45 ACP pistols with compact grip. A KimPro Tac-Mag maximizes the performance of any 1911 pistol. Premium features include Teflon-coated stainless steel follower Rocket wire spring and large round-count recognition holes . An exclusive quick-change floorplate permits the immediate attachment of one of three included bases ? a conventional stainless steel plate slim bumper pad for carry or a thick bumper pad for competition or use with extended magazine wells. Compatibility: Kimber Compact & Ultra* models Colt Officer?s Models. *Not compatible with Ultra+ models.