TacFire Mil-Spec M4 Stock Kit Features The TacFire Mil-Spec M4 Stock Kit brings together every part needed to install a six position collapsible stock on an AR-15 or M4 pattern rifle. The mil-spec buffer tube accepts the included carbine length buffer spring and 3 ounce buffer giving the action the mass and spring pressure it needs to cycle reliably. The M4 style stock slides smoothly along the tube and locks at six length of pull positions letting the shooter adjust the fit for body armor different shooters or personal preference. Rounding out the assembly the regular end plate and castle nut secure the buffer tube to the receiver extension threads for a solid mil-spec correct build. Weighing in at just over 17 ounces for the full six piece kit the components are proportioned to match factory carbine dimensions without adding unnecessary bulk. The stock and hardware are finished in black to match most AR-15 builds and the mix of steel aluminum and polymer construction balances durability with manageable weight. Because every part in this kit is mil-spec sized it drops onto a standard AR-15 or M4 lower without any custom fitting. It is a practical option for a first-time build a stock replacement or simply keeping a spare kit on hand for future projects. TacFire Mil-Spec M4 Stock Kit Specifications Manufacturer: TacFire Model: Mil-Spec M4 Stock Kit Compatible Hosts: AR-15 / M4 Color: Black Material: Steel Aluminum Polymer Length: 11.5 Weight: 17.2 oz Number of Pieces: 6 Includes: Mil-Spec 6 Position Buffer Tube M4 Style Stock 3 oz Buffer Carbine Length Buffer Spring Regular End Plate Castle Nut Available At: GrabAGun