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Maximize your velocity scaling, eliminate gas-in-face distraction boundaries, and secure absolute long-range consistency without disrupting your left-handed stance or cheek weld. The PRO2A LEFT HAND 24" 6mm ARC Rifle Length Upper Kit delivers dedicated mirror-image ergonomics to the modern southpaw marksman in a seamlessly matched, comprehensive workbench bundle. Engineered natively with a premium forged left-side ejection layout, this platform safely moves hot spent brass and high-pressure unburnt powder streams completely away from your line of sight. Centered around a heavy-duty 24-inch medium profile barrel, it maximizes velocity extraction from Hornady's advanced 6mm ARC round. It features an ultra-consistent rifle-length direct impingement gas cycle to significantly dampen weapon torque, all enveloped within a lightweight 15-inch free-float aluminum rail. Paired alongside a dedicated left-handed Type II bolt carrier group, full internal lower parts components, and a robust adjustable mil-spec rifle stock system, this kit drops onto any standard lower receiver to eliminate part-matching guesswork.
| Upper Receiver | Milspec Billet Aluminum, Dedicated Left-Hand Left-Side Ejection Port Profile, M4 Feed Ramps, Type III Hardcoat Anodized Black |
|---|---|
| Barrel Length & Profile | 24-Inch Medium Profile |
| Caliber | 6mm ARC (Advanced Rifle Cartridge) |
| Twist Rate | 1:7.5 Twist |
| Barrel Material | 4150 Chrome Moly Vanadium Steel with QPQ Melonite Nitride Finish |
| Gas System | Rifle Length Direct Impingement with Low-Profile Gas Block |
| Bolt Carrier Group (BCG) | Milspec Left Handed Full Auto M16 Profile,Nitride Finish, 9310 Bolt, 8620 Carrier, MPI Tested |
| Lower Parts Kit | Complete AR-15 Lower Parts including Mil-Spec Trigger Group, Springs, Detents, Pins, and Pistol Grip |
| Stock Assembly | Adjustable Mil-Spec M4 Stock, Mil-Spec 6 Position Buffer Tube, Weighted Recoil Buffer, and Buffer Spring |
| Charging Handle | Standard Mil-Spec Aluminum Charging Handle |
| Handguard System | 15-Inch Free Float Slim Profile Aluminum M-LOK Rail with Continuous Top Picatinny Real Estate |
| Muzzle Device | Standard A2 Flash Hider, 5/8-24 TPI |
Modifying standard right-hand platforms for left-handed competitive shooting forces southpaw operators to tolerate excessive gas splashback and disruptive tracking motions. This upper fixes those flaws at the source. By shifting the ejection dynamic to the left and anchoring the assembly on an American-made, custom-headspaced 24-inch barrel framework, this complete kit guarantees a seamless mechanical timing balance across your left-handed bolt face, carrier mass variables, and buffer spring coefficients. Pro2A Tactical yields sub-MOA reliability and absolute operational comfort right out of the box.
| SKU | P2AL6ARCAX15RIF24-P2A-KIT |
|---|---|
| Barrel Length | 24 inch |
| Rifle Caliber | 6mm ARC |
| Manufacturer | Pro2A Tactical |