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Pro2A Tactical 18 inch AR-15 400 Legend Nitride Barrel

Pro2A Tactical 18 inch AR-15 400 Legend Nitride Barrel

18 inch 400 Legend AR-15 Upper | USA MADE

PRO2A 18" 400 Legend 1/16 Carbine Length Melonite M-LOK AR-15 Upper

PRO2A 16" 400 Legend 1/16 Carbine Length Melonite M-LOK AR-15 Upper

Rating:
97 % of 100
Special Price $399.99 $549.99
Availability:
In stock
SKU
P2A400LGFS12CAR16M-HT
PRO2A 16" 400 Legend 1/16 Carbine Length Melonite M-LOK AR-15 Upper Receiver Assembly | Pro2A Tactical

PRO2A 16" 400 Legend 1/16 Carbine Length Melonite M-LOK AR-15 Upper

Product Description

Maximize your medium-range knockdown power, terminal hard-hitting signature, and straight-wall compliance variables on standard AR-15 platforms. The PRO2A 16" 400 Legend Carbine Length Melonite M-LOK Upper Assembly is expertly engineered from the ground up to handle the specific feeding requirements and robust case expansion dynamics of Winchester's 400 Legend hunting cartridge. Configured on a precision forged 7075-T6 aluminum receiver with specialized feed geometry tailored cleanly for thick, heavy straight-walled ammunition, this setup houses a 16-inch 4150 CMV medium profile barrel. The stable 1:16 twist rate maximizes downrange projectile stabilization, delivering immense kinetic force out to 200 yards up to heavy-grain hunting options. Tuned precisely with a reliable direct impingement carbine gas layout and a low-profile gas block to produce smooth cyclic curves, this assembly drops seamlessly onto any standard AR-15 lower receiver block.

Key Features

  • High-Impact 400 Legend Caliber: Provides superior velocity scaling and terminal energy margins compared to legacy straight-wall choices, perfect for modern deer and hog hunting configurations.
  • Specialized Feed Profiling receiver: Engineered specifically to cycle heavy straight-walled cartridge walls cleanly and repeatedly without the feeding failures common in unoptimized setups.
  • Resilient Free-Float M-LOK Architecture: Premium 15-inch slim profile aluminum rail isolates the barrel from external handling pressure vectors, ensuring continuous point-of-impact accuracy.
  • Liquid Bath Nitride Protection: Full interior and exterior QPQ Melonite barrel coating provides maximum resistance to heat friction, extreme weather elements, and throat erosion.
  • 100% Sourced & Assembled in the USA: Built to tight manufacturing metrics in Georgia, backed completely by premium custom-shop engineering quality parameters.

Technical Specifications

Upper ReceiverMilspec Forged 7075-T6 Aluminum, Single Large Feed Ramp, Optimized Straight-Wall Feeding Profiling, Forward Assist & Dust Cover, Type III Hardcoat Anodized Black
Barrel Length & Profile16-Inch Medium Contour
Caliber400 Legend (Winchester Straight-Wall)
Twist Rate1:16 Twist (Highly optimized for standard weight straight-wall hunting loads)
Barrel Material4150 Chrome Moly Vanadium Steel with QPQ Melonite Nitride Finish
Gas SystemCarbine Length Direct Impingement with Low-Profile Gas Block
Handguard12-Inch Free Float Slim Profile M-LOK Handguard Rail System
Muzzle DeviceStandard A2 Big Bore Flash Hider, 5/8x24 Thread Pitch

Why Choose This Product?

Hunting inside strict straight-wall restricted states traditionally forced builders into severe compromises over case capacities or semi-automatic reliability thresholds. Pro2A Tactical eliminates these construction variables entirely. By pairing an expertly profiled feed channel receiver upper with a premium 16-inch Melonite barrel, this American-made upper receiver delivers maximum deer-dropping terminal energy and absolute field dependability right out of the box.

More Information
SKU P2A400LGFS12CAR16M-HT
Barrel Length 16 inch
Rifle Caliber 400 Legend
Manufacturer Pro2A Tactical
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