LBE Unlimited MBUF002CG Mil-Spec 6-Position Buffer Tube for AR-15 - Gray

The LBE Unlimited mil-spec 6-position buffer tube for AR-15 is a straightforward, US-made replacement or upgrade component for any AR platform build running collapsible furniture. If you're assembling a new rifle, rebuilding an upper, or keeping spares on the bench, this tube delivers mil-spec diameter compatibility with any stock designed to accept standard AR-15 receiver extensions. The gray Colt finish matches the industrial, no-nonsense aesthetic of mil-spec parts and blends cleanly with most builds.

LBE Unlimited has built a reputation manufacturing AR components stateside, and this buffer tube reflects that straightforward approach: pre-threaded for immediate installation, properly dimensioned to spec, and ready to pair with your choice of collapsible stock. The six-position design gives you adjustment options for length of pull, letting you tune ergonomics for your frame, gear loadout, or shooting position.

Whether you're a competitive shooter dialing in a rifle, a hunter looking for a reliable mil-spec extension, or a builder stocking your parts inventory, this tube handles the job without fanfare. It's the kind of component that works quietly in the background—as it should.

Key Features

• US-made mil-spec diameter receiver extension
• Six-position adjustment for variable length of pull
• Pre-threaded and ready to install
• Gray Colt finish
• Compatible with all collapsible AR-15 stocks requiring mil-spec tubes

Specifications

Frequently Asked Questions

Will this buffer tube work with my AR-15 stock?

Yes, if your stock is designed for mil-spec diameter receiver extensions. This tube has standard mil-spec diameter and is pre-threaded for direct installation.

What's the difference between mil-spec and commercial diameter tubes?

Mil-spec and commercial tubes have different internal diameters and are not interchangeable. Make sure your stock is mil-spec before purchasing this tube.

Is this tube ready to use out of the box?

Yes. The tube comes pre-threaded, so you can install it directly onto your lower receiver without additional machine work.

Can I adjust the length of pull with this tube?

Yes. The six-position design allows you to adjust the tube's collapsed length to accommodate different stocks and preferences.