TacFire Mil-Spec M4 Stock Kit is a complete 6-piece assembly for AR-15 and M4 platforms. Constructed with a black polymer stock and matching buffer assembly, the total system weighs 17.20 oz with an overall length of 11.50. The kit includes a 6-position Mil-Spec buffer tube, M4 style stock, 3 oz buffer, carbine buffer spring, regular end plate, and castle nut for full installation. Safety Note Follow all manufacturer installation instructions. Verify proper function and secure mounting before use. Comply with local firearm laws and regulations.