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TacFire 5.56 NATO Black Nitride AR15 Upper - SSBU55616 - 729205658860
Product Description
Staging a dependable carbine requires a solid upper receiver foundation built to handle high round counts without operational failures. The TacFire 5.56 NATO Complete Upper Receiver Group offers an accessible, turn-key solution engineered for defensive builds and general range training. Featuring a 16-inch 4150 Chrome Moly Vanadium steel barrel treated with a durable Black Nitride finish, this upper delivers enhanced surface hardness, heat mitigation, and corrosion resistance under demanding firing schedules.
Chambered in 5.56 NATO, the barrel safely accepts both full-pressure 5.56x45mm cartridges and standard .223 Remington ammunition. The free-float handguard provides ample M-LOK mounting real estate at multiple angles, allowing direct attachment of tactical lights, foregrips, and sling points while isolating barrel flex to preserve inherent accuracy. A standard A2 flash hider comes pre-installed onto the 1/2x28 threaded muzzle to assist in signature reduction and thread protection.
Precision-machined from forged 7075-T6 aluminum, the upper receiver features standard M4 feed ramps and a MIL-STD-1913 Picatinny top rail for seamless alignment with red dots, iron sights, or LPVO optics. The SSBU55616 drops directly onto any MIL-SPEC AR-15 lower receiver, delivering a straightforward and cost-effective path to completing your next carbine build.
*Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Direct push-pin fitment onto all standard MIL-SPEC AR-15 lower receivers (5.56/.223 pattern). Mates natively with standard AR-15 Bolt Carrier Groups (BCG) and charging handles. Free-float rail accepts standard M-LOK direct-attach accessories and low-profile gas block configurations.
Installation Sequence:
- Clear your workspace and verify the lower receiver is completely unloaded with safety engaged.
- Lightly coat an AR-15 Bolt Carrier Group and standard charging handle with quality firearm lubricant and slide them into the upper receiver channel.
- Align the upper receiver front pivot lug and rear takedown lug with the receiver pin holes on the lower assembly.
- Push the front pivot pin and rear takedown pin fully inward until locked into place.
- Cycle the charging handle manually to verify smooth bolt travel, complete lockup, and proper disconnector reset.
Key Features
- 16-Inch 4150 CMV Barrel: Finished in Black Nitride for enhanced wear resistance, barrel life, and corrosion protection.
- 5.56 NATO Chambering: Safely handles high-pressure 5.56x45mm NATO duty rounds and commercial .223 Remington loads.
- Free-Float M-LOK Handguard: Provides a continuous top Picatinny rail and M-LOK accessory slots without contacting the barrel.
- 7075-T6 Forged Upper Receiver: Machined to exact MIL-SPEC tolerances with integrated M4 feed ramps and hardcoat anodizing.
- Threaded Muzzle (1/2x28): Pre-equipped with an A2 flash hider, easily swappable for silencer muzzle devices or compensators.
Product Specifications
- Brand: TacFire
- Model: 5.56 NATO Black Nitride Upper Receiver
- MPN: SSBU55616
- UPC: 729205658860
- Caliber: 5.56x45mm NATO / .223 Remington
- Barrel Length: 16 Inches
- Barrel Material: 4150 Chrome Moly Vanadium Steel
- Barrel Finish: Black Nitride
- Receiver Material: Forged 7075-T6 Aluminum
- Finish: Matte Black Hardcoat Anodized
- Handguard: Free-Float M-LOK Rail
- Muzzle Thread Pitch: 1/2"x28 TPI
- Muzzle Device: A2 Flash Hider
