Luth-AR A2 Rifle Buffer Tube Assembly

The Luth-AR A2 Rifle Buffer Tube Assembly is a complete mil-spec kit designed for builders who want to upgrade their AR-15 platform to full rifle-length recoil management. Whether you're assembling a new rifle from the ground up or converting an existing build, this kit gives you everything needed to install an A2-pattern buffer system. It's built to original mil-spec dimensions and materials, making it a straightforward choice for shooters who value reliability and standardization.

This assembly uses a 6061-T6 aluminum tube with hardcoat anodized black finish, the same material spec as military-issue components. The kit arrives complete with the extension tube, buffer spring, and buffer body—no additional trips to source individual parts. One important note: if you're converting a carbine-length gas system to this rifle-length system, you may run into reliability issues. A rifle-length gas tube is the proper match for this buffer setup.

Luth-AR components are popular among AR-15 builders and gunsmiths who need dependable, spec-correct parts without the premium markup. This kit is especially useful for dedicated rifle builds, modern sporting rifle projects, or anyone standardizing on A2-pattern ergonomics across multiple platforms.

Key Features

• Complete mil-spec kit—buffer tube, spring, and body assembly included
• 6061-T6 aluminum construction with hardcoat anodized black finish
• A2 rifle-length design for rifle gas tube systems
• Standard .223 rifle buffer spring
• Ready for assembly or installation on AR-15 platform rifles

Specifications

Frequently Asked Questions

Will this A2 rifle buffer tube work on my carbine-length AR-15?

No. This is a rifle-length buffer system designed for rifles with rifle-length gas tubes. Attempting to use it on a carbine-length gas system may cause reliability issues. Make sure your rifle's gas tube length matches this rifle-length assembly.

What's included in the kit?

The kit includes an A2 rifle buttstock extension tube, a standard .223 rifle buttstock buffer spring, and a rifle buffer body assembly. All three components are included—you don't need to buy parts separately.

Can I use this kit for a new AR-15 build?

Yes. This is a complete mil-spec kit designed for builders assembling new rifles or converting existing platforms to A2 rifle-length recoil systems, provided they have a rifle-length gas tube.

What material is the buffer tube made from?

The extension tube is 6061-T6 aluminum with a hardcoat anodized black finish, matching military specification standards.