Building or refreshing an AR-15 or LR-308 platform rifle? The Bravo Company mil-spec receiver extension buffer tube stock hardware kit gives you everything needed to mount a collapsible stock to your lower receiver in one complete package. Bravo Company engineered these components to mil-spec standards, so you're working with parts that meet the same durability and tolerance requirements trusted by serious shooters and builders. This is the backbone of a proper carbine setup—no hunting through bins for individual pieces or worrying about compatibility headaches.

The kit includes the receiver extension tube itself (6-position, mil-spec dimensioned aluminum in matte finish), the end plate, castle lock nut, action spring, and carbine buffer assembly. That's your complete tube-and-buffer system ready to go. Bravo Company's mil-spec design works with a wide range of aftermarket and OEM stocks: BCM, VLTOR, LMT, Magpul CTR-M, Stag Arms, Colt, and other mil-spec-compatible options. If you're upgrading an existing rifle, replacing worn internals, or assembling from scratch, this kit eliminates guesswork and gets you one step closer to a complete, functional carbine.

Aluminum construction in matte finish is durable and sits cleanly with most AR builds. Whether you're setting up a home-defense rifle, a range gun, or a hunting platform, having all the receiver extension hardware from a reputable maker like Bravo Company means you're starting with a solid foundation. No surprises, no compatibility questions—just reliable, mil-spec hardware that works.

Key Features

• Complete mil-spec receiver extension system in one kit—no separate ordering
• 6-position collapsible tube for adjustable length of pull
• Includes end plate, castle nut, action spring, and carbine buffer assembly
• Compatible with most mil-spec collapsible stocks from major brands
• Aluminum construction with matte anodized finish
• Works on AR-15 and LR-308 platforms

Specifications

Manufacturer	Bravo Company
Platform	AR-15 / LR-308
Tube Type	Mil-Spec Receiver Extension
Positions	6-Position
Material	Aluminum
Finish	Matte
Included Components	Receiver Extension, End Plate, Castle Lock Nut, M4 Action Spring, Carbine Buffer Assembly

Frequently Asked Questions

What stocks will this kit work with?

The mil-spec receiver extension in this kit is compatible with collapsible stocks from Bravo Company, VLTOR, LMT, Magpul CTR-M, Stag Arms, Colt, and other manufacturers that use mil-spec dimensions. If your stock has a mil-spec diameter tube mounting point, it will work with this hardware.

Can I use this on both AR-15 and LR-308 rifles?

Yes. The mil-spec receiver extension and buffer system are compatible with both AR-15 and LR-308 platforms.

What's included in the kit?

This is a complete receiver extension kit containing the 6-position mil-spec aluminum tube, end plate, castle lock nut, M4 action spring, and carbine buffer assembly. You'll have everything needed to mount a compatible stock to your lower receiver.

Is this a complete buffer system or just the tube?

It's a complete system. The kit includes the receiver extension tube, end plate, castle nut, action spring, and carbine buffer—everything required for a functional receiver extension assembly.