The EXT Mid Length Free Float Kit provides ultimate strength and durability while also providing comfort and functionality. The Length of this free float is 11.5″ and weighs 1.03 pounds. Featuring continuous top picatinny rail and bottom and sides designed to accept picatinny rails. Also featuring integral sling swivel attachment points. Made from 6061-T6 Aluminum, and finished to Mil Spec with type III Hard Coat Anodizing. This Kit includes a steel barrel nut (1 ¼”-18 thread), 3 allen head bolts, and two quick disconnects for forearm. The EXT series comes in Pistol, Carbine, Mid, and Rifle Lengths allowing it to fit the needs of your AR-15 build. Will need the Anderson’s AM15 Barrel Nut Wrench.