Are you at least 18 years old?
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.
| Upper Receiver | Milspec Forged 7075-T6 Aluminum, Single Large Feed Ramp, Optimized Straight-Wall Feeding Profiling, Forward Assist & Dust Cover, Type III Hardcoat Anodized Black |
|---|---|
| Barrel Length & Profile | 16-Inch Medium Contour |
| Caliber | 400 Legend (Winchester Straight-Wall) |
| Twist Rate | 1:16 Twist (Highly optimized for standard weight straight-wall hunting loads) |
| Barrel Material | 4150 Chrome Moly Vanadium Steel with QPQ Melonite Nitride Finish |
| Gas System | Carbine Length Direct Impingement with Low-Profile Gas Block |
| Handguard | 12-Inch Free Float Slim Profile M-LOK Handguard Rail System |
| Muzzle Device | Standard A2 Big Bore Flash Hider, 5/8x24 Thread Pitch |
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.
| SKU | P2A400LGFS12CAR16M-HT |
|---|---|
| Barrel Length | 16 inch |
| Rifle Caliber | 400 Legend |
| Manufacturer | Pro2A Tactical |