
Availability: In Stock
The TacFire MAR050B Mil-Spec Buffer Tube is a black matte AR-15 buffer tube built to military specifications. If you're building or upgrading an AR platform rifle, a quality buffer tube is the foundation of your stock assembly—it houses the buffer spring, positions your stock, and handles the recoil cycle. This TacFire tube delivers no-nonsense functionality at a working-gunner's price point, ideal for hunters, competition shooters, and anyone maintaining or customizing an AR-15 or M4-pattern rifle.
Mil-Spec tubes are the standard in the AR world: they're dimensionally consistent, widely compatible, and proven in the field. The MAR050B's black matte finish resists glare and blends with most furniture. Whether you're assembling a precision hunting build, a 3-gun competition rig, or refreshing an existing platform, starting with a mil-spec tube means your stock assembly will function reliably and accept aftermarket components without surprises.
TacFire offers the essentials: solid engineering, honest performance, and the kind of value that lets you spend your budget where it counts—barrel, optic, trigger, ammo. This buffer tube paired with a matched spring, buffer, and stock gives you everything needed to complete the rear end of your AR. If you're swapping out worn hardware or building from scratch, it's a straightforward choice for duty-ready or sport shooting.
| Product | TacFire MAR050B Mil-Spec Buffer Tube |
| Finish | Black Matte |
| Compatibility | AR-15, M4-pattern rifles |
| Specification Standard | Mil-Spec |
The MAR050B buffer tube alone is the tube component. Note that TacFire offers a complete mil-spec stock kit (MAR050B designation may refer to the full assembly) that includes the buffer tube, a 6-position stock with butt pad, carbine-length buffer spring, regular end plate, 3 oz. buffer, and castle nut—check your order details to confirm whether you're purchasing the tube only or the complete kit.
Yes. The TacFire MAR050B is mil-spec, meaning it meets the standard AR-15/M4 platform dimensions and will work with mil-spec stocks, springs, and buffers from any manufacturer. It's designed for AR-15 and M4-pattern rifles.
Mil-spec buffer tubes are the industry standard and accept mil-spec stocks. As long as your stock is mil-spec—the vast majority are—it will fit and function on this tube.

SKU: 152747405 • Width: 9.6in • Height: 1.9in • Depth: 13.4in • Weight: 1.335oz





Availability: In Stock
The TacFire MAR050B Mil-Spec Buffer Tube is a black matte AR-15 buffer tube built to military specifications. If you're building or upgrading an AR platform rifle, a quality buffer tube is the foundation of your stock assembly—it houses the buffer spring, positions your stock, and handles the recoil cycle. This TacFire tube delivers no-nonsense functionality at a working-gunner's price point, ideal for hunters, competition shooters, and anyone maintaining or customizing an AR-15 or M4-pattern rifle.
Mil-Spec tubes are the standard in the AR world: they're dimensionally consistent, widely compatible, and proven in the field. The MAR050B's black matte finish resists glare and blends with most furniture. Whether you're assembling a precision hunting build, a 3-gun competition rig, or refreshing an existing platform, starting with a mil-spec tube means your stock assembly will function reliably and accept aftermarket components without surprises.
TacFire offers the essentials: solid engineering, honest performance, and the kind of value that lets you spend your budget where it counts—barrel, optic, trigger, ammo. This buffer tube paired with a matched spring, buffer, and stock gives you everything needed to complete the rear end of your AR. If you're swapping out worn hardware or building from scratch, it's a straightforward choice for duty-ready or sport shooting.
| Product | TacFire MAR050B Mil-Spec Buffer Tube |
| Finish | Black Matte |
| Compatibility | AR-15, M4-pattern rifles |
| Specification Standard | Mil-Spec |
The MAR050B buffer tube alone is the tube component. Note that TacFire offers a complete mil-spec stock kit (MAR050B designation may refer to the full assembly) that includes the buffer tube, a 6-position stock with butt pad, carbine-length buffer spring, regular end plate, 3 oz. buffer, and castle nut—check your order details to confirm whether you're purchasing the tube only or the complete kit.
Yes. The TacFire MAR050B is mil-spec, meaning it meets the standard AR-15/M4 platform dimensions and will work with mil-spec stocks, springs, and buffers from any manufacturer. It's designed for AR-15 and M4-pattern rifles.
Mil-spec buffer tubes are the industry standard and accept mil-spec stocks. As long as your stock is mil-spec—the vast majority are—it will fit and function on this tube.
SKU: 152747405 • Width: 9.6in • Height: 1.9in • Depth: 13.4in • Weight: 1.335oz
