Product Description MATERIAL: 6061 Aluminum Alloy - Stainless Steel Hardware; DIMENSIONS: 2.8" X 1.4" OAL; COLOR: FLAT BLACK; COATING: Type III ( MIL-SPEC ) Hard Anodize; PICATANNY RAIL: Nato Stanag 4694 SPEC Accu-Tac Sling Stud Rail Adapter, Anodized Finish, Black Color at GritrSports $51.90 Buy Now Check Price on Amazon Check Price on eBay