LBE Unlimited Mil-Spec 6-Position AR-15 Buffer Tube - Red (MBUF002RED)

The LBE Unlimited Mil-Spec 6-Position AR-15 buffer tube in red is a US-made receiver extension built to mil-spec diameter, so it'll work with any collapsible AR-15 stock designed for standard mil-spec tubes. Whether you're finishing a new build, swapping stocks on an existing rifle, or stocking your spare parts drawer, this pre-threaded tube handles the job without fuss. LBE Unlimited's reputation is built on solid domestic manufacturing, and this buffer tube reflects that straightforward, no-frills approach to AR platform reliability.

The 6-position design gives you flexibility in cheek weld and sight picture, letting you dial in the length of pull that works for your shooting style and body geometry. Red anodizing makes it easy to spot in your parts bin and adds a touch of visual distinction to your build. Since it arrives pre-threaded, installation is as simple as threading it onto your lower receiver—no machine work required.

If you're building an AR from the ground up or refreshing a rifle that's seen hard use, a quality buffer tube is one of those foundation parts that deserves attention. This tube gives you the mil-spec compatibility you need and the domestic build quality that keeps things running clean.

Key Features

• Mil-spec diameter—compatible with all standard mil-spec collapsible AR-15 stocks
• 6-position adjustment for customized length of pull and sight picture
• Pre-threaded for direct installation onto mil-spec lower receivers
• Red anodized finish for durability and easy identification
• US-made by LBE Unlimited

Specifications

Frequently Asked Questions

Will this buffer tube fit my collapsible AR-15 stock?

Yes, the LBE Unlimited Mil-Spec 6-Position buffer tube is mil-spec diameter and will fit all collapsible AR-15 stocks designed for mil-spec tubes. If your stock is mil-spec compatible, this tube will work with it.

Do I need any tools or gunsmithing to install this?

No. The tube arrives pre-threaded, so installation is straightforward—simply thread it onto your mil-spec lower receiver. No machining or additional work is required.

What's the difference between 6-position and other buffer tube options?

The 6-position design allows you to adjust the length of pull across six different settings, giving you flexibility to find the cheek weld and sight picture that works best for your body geometry and shooting style.

Is this tube made in the USA?

Yes. LBE Unlimited manufactures this buffer tube domestically.