TacFire MAR049B Mil-Spec AR-15 Aluminum Buffer Tube Kit - Black (AR-Pistol Platform)

Building an AR-pistol platform requires a solid foundation, and the TacFire MAR049B Mil-Spec AR-15 aluminum buffer tube kit delivers exactly that. Designed to spec with your ar-pistol build, this complete kit includes everything you need to install a proper recoil management system without the guesswork. Whether you're assembling your first short-barreled upper or upgrading an existing pistol, having a mil-spec buffer tube kit with all components on hand saves a trip back to the shop and keeps your build moving.

The kit centers on a mil-spec aluminum buffer tube with integrated foam insert—engineered to reduce rattle and keep components stable during firing and handling. Paired with a 3 oz. buffer and carbine-length buffer spring, this combination handles the recoil impulse of most ar-pistol calibers and configurations. The dual-loop sling adapter end plate gives you mounting flexibility for your preferred carry setup, while the castle nut ensures everything stays locked in place under repeated firing cycles.

TacFire has packaged all five essential pieces here so you're not hunting down individual components or settling for partial kits. This is straightforward, no-frills gear for shooters who want to focus on their build, not on sourcing parts.

Key Features

• Complete ar-pistol buffer tube system—five components included
• Mil-spec aluminum tube with foam insert to reduce component rattle
• 3 oz. buffer weight paired with carbine-length spring
• Dual-loop sling adapter end plate for versatile carry options
• Castle nut included for secure installation

Specifications

Frequently Asked Questions

Will this buffer tube kit work with my AR-pistol build?

Yes. This is a mil-spec ar-pistol buffer tube kit designed for ar-pistol platforms. It includes all five components needed for installation.

What comes in the kit?

The MAR049B includes a mil-spec aluminum buffer tube with foam insert, a 3 oz. buffer, a carbine-length buffer spring, a dual-loop sling adapter end plate, and a castle nut.

Can I use the sling adapter end plate with any sling?

The dual-loop design offers mounting flexibility, but compatibility depends on your specific sling type. The loops accommodate common sling attachment methods used in the ar-pistol community.

Is the buffer tube already assembled?

The buffer tube comes with the foam insert pre-installed. You will assemble the tube, buffer, spring, end plate, and castle nut during installation on your lower receiver.