TacFire MAR049A AR-15 Mil-Spec Buffer Tube Kit - Black
$24.38
- Firearm Group:
- AR Platform
A mil-spec buffer tube kit for AR-15 builds doesn't sound glamorous, but it's one of those foundational components that separates a reliable, smooth-shooting rifle from a headache. The TacFire MAR049A AR-15 Mil-Spec Buffer Tube Kit is purpose-built for shooters and builders who need a no-nonsense, mil-spec compliant receiver extension that works with standard AR platforms. Whether you're assembling a new lower receiver, replacing a worn buffer tube assembly, or upgrading a rifle that's seen hard use, this kit delivers the parts you need in one straightforward package.
What makes a mil-spec buffer tube kit essential: it handles the recoil management job that a quality build demands. The kit includes a mil-spec buffer tube with integrated foam insert, a 3-ounce buffer, carbine-length buffer spring, standard end plate, and castle nut—everything required for proper assembly in a mil-spec lower receiver. The 3-ounce buffer is the working component that absorbs and moderates the hammer blow from your bolt carrier group, so you get consistent cycling and manageable recoil impulse. Carbine-length springs are the standard for most AR-15 configurations, making this kit the go-to for common builds.
TacFire has built a reputation on delivering functional, mil-spec correct components at honest value. Black finish protects against corrosion and blends into almost any build aesthetic. This is the kind of part that works quietly in the background—no flash, no drama, just reliable performance that lets you focus on accuracy and the shooting itself.
Key Features
- Mil-spec buffer tube with foam insert for noise and vibration dampening
- 3 oz. buffer for balanced recoil management in standard AR-15 configurations
- Carbine-length buffer spring—the universal standard for AR platform rifles
- Standard end plate and castle nut for secure, mil-spec correct assembly
- Black finish resists corrosion and complements any receiver build
- Complete kit—all receiver extension components included
Specifications
| Brand | TacFire |
| Model | MAR049A |
| Type | AR-15 Mil-Spec Buffer Tube Kit |
| Buffer Weight | 3 oz. |
| Spring Length | Carbine |
| Finish | Black |
| Included Components | Mil-spec buffer tube with foam insert, 3 oz. buffer, carbine-length buffer spring, end plate, castle nut |
Frequently Asked Questions
Is this buffer tube kit compatible with mil-spec AR-15 lower receivers?
Yes. The TacFire MAR049A is built to mil-spec dimensions and is designed to function in any standard mil-spec AR-15 lower receiver.
What is the 3 oz. buffer used for in an AR-15?
The buffer absorbs energy from the bolt carrier group during recoil, moderating the impulse transmitted to the shooter and helping the firearm cycle reliably. A 3 oz. buffer is standard for most carbine and rifle configurations.
What components are included in this kit?
The kit includes one mil-spec buffer tube with foam insert, one 3 oz. buffer, one carbine-length buffer spring, one standard end plate, and one castle nut. These are all the parts necessary to assemble the receiver extension in your lower receiver.
Can I use this kit for a pistol-caliber AR build?
This kit is listed as a mil-spec buffer tube assembly and should be used with standard mil-spec AR-15 platforms. For pistol-caliber or specialized builds, verify compatibility with your specific lower receiver and operating system before installation.
