TacFire A2 AR-10/.308 Fixed Stock Kit, Polymer, Black, MAR123-308

308 Fixed Stock Kit is the one that you need. This A2 style fixed stock kit fits standard AR-10/AR-308 lower receivers. The AR15 Stocks includes a rifle length receiver extension tube A2 buffer buffer spring spacer and screw. The hinged butt plate provides access to the internal storage compartment.