The Warne Shotgun Rib Mount is a revolutionary 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 barrel 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. FitsAimpoint T1-T2Aimpoint Micro H1-H2Holosun 403, 503, 515, 530Sig Romeo 5Vortex Crossfire