This RMR mount from Trijicon allows you to mount any of the Trijicon RMR reflex sights onto a 1911 AC32058 pistol with .248" drop novak-cut sights. Professional installation recommended. Specifications: - fits: 1911 AC32058 pistol with .248" drop novak-cut sights - material: aluminum - weight: 1.05 oz. - finish: black. RMR mount includes: - 1 RMR mount with dovetail base - 1 sealing plate - 3 socket set screws - 2 RMR mount screws - 1 allen wrench