The Luth-AR 308 Mil-Spec Carbine Buffer Tube Complete Assembly Kit (brand part number 308-M-BAP) gives AR-10 builders everything needed to finish the buffer system on a .308 carbine build. The kit includes a mil-spec diameter carbine buffer tube sized for AR-10 lowers, a matching .308 carbine recoil buffer, a carbine recoil spring, a receiver end plate, and a castle nut. Because .308 recoil impulse differs significantly from a 5.56 build, using a buffer and spring weighted for the caliber, as this kit provides, helps keep the rifle cycling reliably. It is a straightforward way to complete an AR-10 lower build without sourcing each buffer component separately from multiple vendors.

Key Specifications

• Includes a mil-spec diameter carbine buffer tube sized for AR-10 lower receivers.
• Buffer is a .308-specific carbine recoil buffer, weighted for AR-10 cycling.
• Comes with a matching carbine recoil spring tuned to the buffer weight.
• Includes a receiver end plate for proper buffer tube retention.
• Comes with a castle nut to secure the buffer tube to the lower receiver.
• Sold as a complete assembly kit for AR-10 rifles, not individual components.

Frequently Asked Questions

What comes in this kit? A mil-spec carbine buffer tube, .308 carbine recoil buffer, carbine recoil spring, receiver end plate, and castle nut.

What rifles is this kit built for? AR-10 rifles chambered in .308, using a carbine-length buffer tube.

Does this fit a standard AR-10 lower? Yes, the buffer tube is sized to mil-spec diameter for broad AR-10 lower compatibility.

Buy the Luth-AR 308 Mil-Spec Carbine Buffer Tube Assembly

Order the Luth-AR 308 buffer tube assembly kit from our Lubbock, Texas gun shop for fast, insured shipping. See more Luth-AR AR-10 parts for your build.