The TacFire AR-10 Carbine Buffer Tube Kit (brand part no. MAR047-308-A) supplies everything needed to finish out the back end of a .308 AR-10 build with a standard end plate. The kit includes a mil-spec 6-position buffer tube sized for AR-10 pattern receivers, a 3.8 oz. buffer matched to .308-length cycling, and a dedicated .308 buffer spring. A standard end plate and castle nut round out the kit, so the buffer assembly is ready to install without hunting down individually compatible parts. It’s a straightforward way to complete a mil-spec AR-10 stock setup.

Key Specifications

• Built around a mil-spec 6-position buffer tube sized for AR-10/.308 receivers.
• Includes a 3.8 oz. buffer matched for proper .308-length cycling.
• Ships with a dedicated .308 buffer spring.
• Includes a standard end plate for mounting to the lower receiver.
• Comes with a castle nut to secure the buffer tube in place.

Frequently Asked Questions

Is this a complete buffer tube assembly? Yes, it includes the buffer tube, buffer, spring, end plate, and castle nut.

Is it sized for .308 AR-10 builds? Yes, the buffer and spring are matched for AR-10/.308 cycling.

Buy the TacFire AR-10 Carbine Buffer Tube Kit

Finish your AR-10 build with a complete, mil-spec buffer tube kit in one order. Get the TacFire AR-10 Buffer Tube Kit from our Lubbock, Texas gun shop for fast, reliable shipping — or browse more rifle accessories and parts.