1.8 inch facetted O.D .offers a comfortable shooting platform while not being to large for most shooters. Accessory rails can be added or removed easily to adapt the hand guard to your needs (units can also be mounted at 45 degree offsets). Thermal bushing locks onto the stock barrel nut. No special tools required for installation. Inside diameter is large enough to fit most suppressors (1.56 inch). Continuous mil spec top rail. Duel anti rotation tabs. Relieved for most gas piston systems. Thermal Bushings helps reduce heat transfer to hand guard. Supplied with 2x 2 inch rail kit and 1x 4 inch rail kit. Tube material 6010 T6, bushing material 303 stainless. Mil-spec Hard coat Anodized.
Retail Price : 159.00 Description : Evolution 556 Rail 11 Inch Rifle Length Rail AR-15 Parts : AR-15 Parts Made In The USA : Made In The USA Tactica : Tactical Catalog Vendor Name : SAMSON MANUFACTURING Model Body Copy : 10.5 ounce.