The Keymod Carbine Length Free Float Kit provides ultimate strength and durability while also providing comfort and functionality. The Length of this free float is 12″ and weighs .80 pounds. Featuring continuous top picatinny rail and bottom and sides designed to accept Keymod rails. 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), spacer, and 3 allen head bolts, for forearm. The Keymod series comes in Carbine and Rifle Lengths. Will need the Anderson’s AM15 Barrel Nut Wrench.