The Warne Shotgun Rib Mount is a revolutionary new mount design that allows shooters to mount various style red dot optics that use the Aimpoint T1 or T2 interface to most vented rib shotgun barrel. Many popular shotgun *models are not drilled and tapped for a conventional scope base or rail, Warne's proprietary clamp design attaches directly to a vented rib 6-10mm wide and allows for a low profile universal mounting plate that fits most popular RDS sights. While The Warne Shotgun Rib Reflex Mount is great for turkey, waterfowl and upland bird hunting, it is equally effective for clays, competition and tactical use. 6111M Fitments: Aimpoint T1-T2 Aimpoint Micro H1-H2 Holosun 403, 503, 515, 530 Sig Romeo 5 Vortex Crossfire *Does not fit Benelli 20 gauge rib Designed and MADE IN USA Red dot not included