TacFire 5.56 NATO 10.5" Complete AR15 Upper Receiver Black Nitride - SSBU55610

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TacFire 5.56 NATO Black Nitride Complete AR15 Upper - SSBU55610 - 72920568884

Product Description

Staging a compact AR-15 pistol or registered Short-Barreled Rifle (SBR) requires an upper receiver group engineered for tight-quarters maneuverability without sacrificing mechanical reliability. The TacFire 5.56 NATO 10.5" Complete Upper Assembly provides a streamlined, compact solution built specifically for vehicle staging, home defense, and low-profile tactical configurations. Centered on a 10.5-inch 4150 Chrome Moly Vanadium steel barrel with a Black Nitride finish, this assembly delivers superior surface hardness and corrosion protection against harsh environments and rapid-firing cycles.

Chambered in 5.56 NATO, the 10.5-inch barrel safely accommodates both full-pressure 5.56x45mm cartridges and standard .223 Remington ammunition. The short overall length dramatically improves handling in confined spaces, while the included free-float M-LOK handguard provides essential mounting slots for tactical lights, foregrips, and hand stops. A standard A2 flash hider comes installed on the 1/2x28 threaded muzzle to assist in muzzle signature suppression and protect the crown during transport.

Precision-machined from forged 7075-T6 aluminum, the upper receiver features M4 feed ramps and a continuous MIL-STD-1913 Picatinny top rail to ensure rigid optics and iron sight mounting. The SSBU55610 drops directly onto any standard AR-15 pistol or registered NFA lower receiver, offering a cost-effective, high-performing foundation for ultra-compact carbine builds.

*Armorer Bench Notes & Real-World Staging Guidance:

Fitment Matrix: Direct push-pin fitment onto all standard MIL-SPEC AR-15 lower receivers (pistol or registered SBR configurations). Accepts standard AR-15 Bolt Carrier Groups (BCG) and charging handles. Handguard accepts direct-attach M-LOK accessories and low-profile gas block setups.

Installation Sequence:

1. Verify the lower receiver is completely clear and unloaded before beginning assembly.
2. Apply a light coat of CLP/lubricant to a standard AR-15 Bolt Carrier Group and charging handle, then slide them into the upper receiver channel.
3. Align the upper receiver front pivot lug and rear takedown lug with the corresponding receiver pin holes on the lower.
4. Push the front pivot pin and rear takedown pin firmly into place to secure the upper assembly.
5. Cycle the action manually to verify smooth bolt travel, correct gas key clearance, and positive lockup.

Key Features

• 10.5-Inch 4150 CMV Barrel: Finished in Black Nitride for maximum corrosion resistance and heat tolerance in compact setups.
• 5.56 NATO Chambering: Safely handles high-velocity 5.56x45mm NATO ammunition as well as commercial .223 Remington.
• Compact Free-Float M-LOK Handguard: Keeps overall mass minimal while offering dedicated attachment points for lights and hand stops.
• Forged 7075-T6 Receiver: Machined to strict MIL-SPEC tolerances with integrated M4 feed ramps and Type III Hardcoat Anodizing.
• Standard 1/2x28 Muzzle Threading: Pre-installed A2 flash suppressor easily removable for mounting suppressors or blast diverters.

Product Specifications

• Brand: TacFire
• Model: 5.56 NATO Black Nitride Complete Upper Assembly
• MPN: SSBU55610
• UPC: 729205658884
• Caliber: 5.56x45mm NATO / .223 Remington
• Barrel Length: 10.5 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