Aircraft Grade Aluminum Construction with a Matte Black Anodize FinishLow 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 OffsetComes with 2 Polymer Inserts to Accept 27mm, 25.4mm (1"), or 20mm Flashlight Tube DiametersAdaptable 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 RequiredMaterial:AluminumWeight:3 ozPieces:Rail Type:M-LOKa ZLength:3.47 inchWidth:1.31 inchHeight:2.06 inch