The Luth-AR 9mm Carbine Buffer Tube Complete Assembly Kit (brand part number 9MM-M-BAP) gives 9mm AR-15 builders everything needed to finish the buffer system in one purchase. The kit includes a mil-spec diameter carbine buffer tube sized for 9mm carbine builds, a 9mm-specific carbine recoil buffer, a matching carbine recoil spring, a receiver end plate, and a castle nut. Because 9mm AR builds cycle differently than a rifle-caliber carbine, using a buffer weight and spring matched to the caliber, like this kit provides, is important for reliable cycling. It is a straightforward way to complete a 9mm AR-15 lower build without sourcing each buffer system component separately.

Key Specifications

• Includes a mil-spec diameter carbine buffer tube sized for AR-15 lower receivers.
• Buffer is a 9mm-specific carbine recoil buffer, weighted for pistol-caliber cycling.
• Comes with a matching carbine recoil spring tuned for the 9mm 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, not individual components.

Frequently Asked Questions

What comes in this kit? A mil-spec carbine buffer tube, 9mm carbine recoil buffer, carbine recoil spring, receiver end plate, and castle nut.

Is this buffer specific to 9mm builds? Yes, the buffer weight is matched to 9mm blowback cycling rather than a rifle-caliber gas gun.

Does this fit a standard AR-15 lower? Yes, the buffer tube is sized to mil-spec diameter for broad AR-15 lower compatibility.

Buy the Luth-AR 9mm Carbine Buffer Tube Assembly

Order the Luth-AR 9mm buffer tube assembly kit from our Lubbock, Texas gun shop for fast, insured shipping. See more Luth-AR AR buffer system parts for your 9mm build.