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Maximize your velocity scaling, long-range wind resistance, and extreme downrange precision on standard AR platforms. The PRO2A 24" 6mm ARC Rifle Length Upper Assembly is meticulously engineered to unlock the absolute ballistic potential of Hornady's Advanced Rifle Cartridge. Built around a premium forged 7075-T6 aluminum receiver with standard right-side ejection configuration tolerances, this system centers on a 24-inch medium profile barrel. The 1:7.5 twist rate perfectly stabilizes heavy, high-BC projectiles across varied atmospheric thresholds. A smooth direct impingement rifle-length gas setup ensures soft, consistent bolt carrier velocities, while an extended 15-inch free-float aluminum handguard wraps the barrel to supply structural rigidity and massive attachment space for high-end optics and bipods.
| Upper Receiver | Milspec Forged 7075-T6 Aluminum, M4 Feed Ramps, Forward Assist & Dust Cover, Type III Hardcoat Anodized Black |
|---|---|
| Barrel Length & Profile | 24-Inch Medium Profile |
| Caliber | 6mm ARC (Advanced Rifle Cartridge) |
| Twist Rate | 1:7.5 Twist Rate |
| Barrel Material | 4150 Chrome Moly Vanadium Steel with QPQ Melonite Nitride Finish |
| Gas System | Rifle Length Direct Impingement with Low-Profile Gas Block |
| Handguard | 15-Inch Free Float Slim Profile M-LOK Handguard Rail System |
| Muzzle Device | Standard A2 Flash Hider, 5/8-24 TPI |
The 6mm ARC round delivers low drag coefficients and exceptional performance that rivals heavy short-action cartridges, fitting comfortably on the lighter AR-15 frame footprint. Pro2A Tactical simplifies your precision rifle configuration project by supplying a complete, premium, ready-to-fire upper system built with strict quality control. It provides maximum muzzle compliance and exceptional field consistency right out of the box.
| SKU | P2A6ARCAX15RIF24-P2A |
|---|---|
| Barrel Length | 24 inch |
| Rifle Caliber | 6mm ARC |
| Manufacturer | Pro2A Tactical |