This receiver extension is designed to work with Mil-Spec dimensioned M4/AR-15 type collapsible stocks. It also can be utilized as a replacement receiver extension for the AR-10 rifle.
VLTOR RE-10/A5SR, Buffer Tube, Six Position, Fits AR-15/AR-10, 7075-T6 Aluminum Construction, Matte Finish, Black RE-10-A5SR
