TacFire MAR047A Mil-Spec AR-15 Buffer Tube Kit - Black

The TacFire MAR047A Mil-Spec AR-15 buffer tube kit gives you a straightforward way to upgrade or repair your rifle's stock system. Whether you're replacing worn-out components or transitioning to a 6-position adjustable setup, this complete kit includes everything needed for a mil-spec installation. It's the kind of no-fuss upgrade that keeps your AR running reliably without requiring a trip to the gunsmith.

This kit works with standard mil-spec AR platforms and delivers the flexibility serious shooters and hunters appreciate. A 6-position tube means you can dial in the stock length for different shooting positions—prone at the range, standing in the field, or behind cover—without swapping parts. The included 3 oz. buffer and carbine-length spring are properly matched to work together, so you're not guessing about compatibility or reliability.

Installation is straightforward for anyone comfortable working on their AR. The kit includes the tube, buffer, spring, end plate, and castle nut—everything in one box. No hunting for parts or worrying whether you grabbed the right weight or length. TacFire delivers solid mil-spec parts at a price that makes sense for hunters, competition shooters, and anyone who prefers to keep a spare parts kit on hand.

Key Features

• Mil-Spec 6-position buffer tube for adjustable stock length
• Complete kit includes tube, buffer, spring, end plate, and castle nut
• 3 oz. buffer and carbine-length spring pre-matched for reliability
• Black finish
• Drop-in replacement for damaged or worn buffer systems

Specifications

Buffer Weight	3 oz.
Spring Length	Carbine
Tube Type	Mil-Spec 6-Position
Finish	Black
Included Components	Buffer tube, buffer, spring, end plate, castle nut

Frequently Asked Questions

Will this kit work with my AR-15?

The TacFire MAR047A is designed for mil-spec AR-15 platforms. If your rifle uses a standard mil-spec receiver extension, this kit will fit.

What comes in the box?

The kit includes a mil-spec 6-position buffer tube, a 3 oz. buffer, a carbine-length buffer spring, a regular end plate, and a castle nut—everything you need for installation.

Can I use this as a replacement if my current system is damaged?

Yes. This kit is designed as a complete replacement system, so you can swap out a damaged or worn buffer tube assembly with this one.

Does the buffer weight affect rifle function?

Buffer weight influences cycling speed and recoil impulse. This kit includes a 3 oz. buffer matched with a carbine-length spring for reliable function in standard mil-spec AR configurations.