Advanced Technology Ar-15 Pistol Buffer Tube Assembly Package

An Advanced Technology AR-15 pistol buffer tube assembly package gives you a complete, mil-spec foundation for building or upgrading an AR pistol platform. This is the backbone of any AR-15 pistol build—where the brace connects to the receiver—and Advanced Technology's version delivers the durability and precision fit you need without the guesswork. Whether you're assembling your first AR pistol or refreshing an existing build, this package includes everything required for a proper installation.

The tube itself is constructed from 6061 T6 aluminum, given a Military Type III anodized finish for corrosion resistance and a professional appearance. The mil-spec tube diameter ensures proper fitment with standard Sig Brace systems and other mil-spec components specified for this application. Threading is military-standard, so you'll get the secure fit into your AR-15 receiver that matters when you're handling recoil. A Vynafoam-padded tube cap provides a solid, comfortable contact point, and the included castle nut and locking ring are steel with a military-grade E-coat finish—designed to stay put under use.

Everything you need to complete the assembly comes in the box: the buffer tube, recoil plug, buffer spring, castle nut, and locking ring. This is a no-surprises package—no hunting for compatible parts or making separate orders. It's made in the USA and backed by a limited lifetime warranty, so you're building on gear designed to last.

Key Features

• Military Type III anodized 6061 T6 aluminum construction for durability and corrosion resistance
• Mil-spec tube diameter for compatibility with Sig Brace systems and standard AR-15 platforms
• Military-standard threads for secure fit into AR-15 receivers
• Vynafoam-padded tube cap for comfort and stability
• Steel castle nut and locking ring with military-grade E-coat finish
• Includes recoil plug and buffer spring—complete assembly package
• Made in the USA
• Limited lifetime warranty

Specifications

Frequently Asked Questions

Is this buffer tube compatible with Sig Brace systems?

Yes. The tube features a mil-spec diameter designed to work with Sig Brace systems and other mil-spec components commonly used on AR-15 pistol platforms.

What comes included in this package?

The package includes the buffer tube itself, recoil plug, buffer spring, steel castle nut, locking ring, and a Vynafoam-padded tube cap. You get everything needed to complete the assembly—no separate orders required.

Will this fit my AR-15 pistol receiver?

This assembly is designed for standard AR-15 pistol platforms with mil-spec receiver dimensions. The military-standard threads ensure a secure fit into a standard AR-15 receiver.

What's the anodized finish for?

The Military Type III anodized finish protects the aluminum tube from corrosion and wear while maintaining a professional appearance. It's a proven standard in firearms manufacturing.