Aobi 30mm Laser Adapter 1" Ring Scope Mounts Tube Flashlight Clamp 20mm 100% Brand New and High Quality Ring Diameterc can fit : 25.4/30mm Rail style: Picatinny Weaver style Made of premium aircraft grade 6061 aluminum Provides a 6 slot weaver-picatinny rail for back-up sights,lights and lasers