CMMG Rifle Length Receiver Extension/Stock Kit, For AR Rifles, Black

Combine this CMMG AR-15 Complete A1 Style Receiver Extension/Stock Kit with your choice of lower parts kit to complete your lower group. Comes with a rifle length receiver extension tube, rifle buffer, rifle buffer spring and A1 length fixed stock. • Kit includes- Receiver extension tube end cap recoil spring and buffer stock and stock screw