Product Features Aircraft Grade Aluminum Construction with a Matte Black Anodize Finish Low Profile, Compact, and Lightweight 3.47" in Length and weighs only 3 oz. Removable Offset Mount Provides 1.60" Forward or Rearward Offset in addition to the Flashlight Ring's 1.12" Vertical or Downward Offset Comes with 2 Polymer Inserts to Accept 27mm, 25.4mm (1"), or 20mm Flashlight Tube Diameters Adaptable Orientation of Flashlight Ring Allows for Increased Compatibility Across More Firearms, Handguards, Front Sights, etc. Includes M-LOK Steel Locking Nuts, Screws, and Allen Wrench for Simple and User Friendly Installation, No Gunsmithing Required Product Specifications Material: Aluminum Weight: 3 oz Pieces: 1 Rail Type: M-LOK Length: 3.47 inch Width: 1.31 inch Height: 2.06 inch Inner Diameter: 0.77 ~ 1.07 inch