Leapers, Inc. - UTG Keymond Offset Flashlight Ring Mount, Low Profile, Comes with Two Inserts to fit 27mm, 25.4mm (1"), or 20mm Flashlight Tube Diameters, Black Finish, Includes Keymod Steel Locking Nuts, Screws, and Allen Wrench for Simple and User Friendly Installation, No Gunsmithing Required RG-FL27KC