The Superlite Same Plane Gas Block is machined from rugged 6061 T6 aircraft aluminum and Type III hard coat anodized to match the finish of most AR style uppers. The 1913 picatinny rail matches the height of a standard mil spec flattop upper receiver allowing the use of any same-plane flip up front sight. The Superlite Block weighs in a just 2.3 oz. and features 4 set screws to ensure a secure fit to your barrel. The block is also long enough to cover the holes where a standard front sight tower may have been. Stylish ports reduce weight while setting your rifle apart from the rest at the range. Includes 5/64 x 1/2 gas tube pin.