LBE Unlimited PBTBLK Black Pistol Buffer Tube for AR-Platform

Building an AR-15 pistol that stays legally compliant means choosing the right receiver extension—and the LBE Unlimited PBTBLK Black Pistol Buffer Tube for AR-Platform is built for exactly that job. This pistol buffer tube is designed without provisions for mounting a buttstock, so you can build or upgrade your AR pistol with confidence that it meets federal guidelines. Unlike a full rifle stock tube, this one lets you keep your build in the pistol category without sacrificing function or durability.

The buffer tube itself is pre-threaded and ready to install straight into any standard Mil-Spec AR-15 lower receiver—no special tools or gunsmithing required. Whether you're putting together your first AR pistol or refreshing an existing build, this is the kind of straightforward, no-nonsense part that does what it should without complications. LBE Unlimited manufactures this tube domestically, so you're getting US-made quality in a black finish that matches most AR builds.

One smart detail: it comes with a foam end cap that covers the tail of the buffer tube. That cap isn't just there for looks—it gives you a more comfortable cheek weld if you're shooting with a stabilizing brace or running your pistol in a way that brings your cheek close to the back of the receiver. It's a small touch that shows the designers thought about how AR pistols actually get used in the field or at the range.

Key Features

• Pre-threaded for direct installation into standard Mil-Spec AR-15 lower receivers
• No buttstock mounting provision—keeps your build legally compliant as a pistol
• Includes foam end cap for improved comfort and cheek weld
• Black finish
• US-made by LBE Unlimited
• Works as a replacement or for new builds

Specifications

Frequently Asked Questions

Will this buffer tube work with my AR-15 lower receiver?

Yes, if your lower is a standard Mil-Spec pattern AR-15, this tube will install directly. It's pre-threaded and designed for easy installation on any compatible receiver.

Can I mount a buttstock on this buffer tube?

No—this pistol buffer tube has no provision for a buttstock. That's by design, so your pistol build remains compliant with federal firearms regulations.

What does the foam end cap do?

The foam end cap covers the tail of the buffer tube and provides a more comfortable surface if you're bringing your cheek to the back of the receiver for a more secure cheek weld, especially useful when running a stabilizing brace or other accessories.

Is this made in the USA?

Yes. LBE Unlimited manufactures this buffer tube domestically.