The TacFire Mil-Spec AR-Pistol Buffer Tube Kit (brand part number MAR049B) bundles everything needed to build out the back end of an AR-pistol lower in one purchase. The kit centers on a black aluminum mil-spec pistol buffer tube with a foam insert to quiet internal rattle, and TacFire pairs it with a buffer, a carbine-length buffer spring, a dual-loop sling adapter end plate, and a castle nut. Every part is sized and matched to work together, so there’s no guessing which buffer or spring length pairs with the tube. For anyone finishing an AR-pistol build or replacing a damaged buffer tube assembly, it’s a complete, mil-spec-correct solution in a single kit.

Key Specifications

• Includes a mil-spec pistol buffer tube finished in black aluminum.
• Tube has a foam insert to reduce internal rattle.
• Kit includes a buffer matched to the pistol tube length.
• Kit includes a carbine-length buffer spring.
• Includes a dual-loop sling adapter end plate for sling attachment points.
• Includes a castle nut to secure the tube to the receiver.
• Built for the AR-pistol platform.

Frequently Asked Questions

What’s included in this kit? A mil-spec pistol buffer tube with foam insert, a buffer, a carbine-length buffer spring, a dual-loop sling adapter end plate, and a castle nut.

Is this for a rifle or an AR-pistol build? It’s built specifically for the AR-pistol platform.

Does the tube include sling attachment points? Yes, the included dual-loop sling adapter end plate provides sling attachment points.

Buy the TacFire Mil-Spec AR-Pistol Buffer Tube Kit – Black

Finish your AR-pistol build with matched, mil-spec-correct parts instead of piecing it together. Order it from our TacFire lineup, part of our rifle stocks selection, at our Lubbock, Texas gun shop for fast, direct shipping.