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Engineered from the ground up for Southpaw shooters demanding a compact footprint without sacrificing performance. The PRO2A Left Hand 6" 300 Blackout Non-Reciprocating Side Charging AR-15 Upper eliminates the issue of gas and unburnt powder blowing back into left-handed eyes. Built around a short, ultra-rigid 6-inch premium 4150 CMV steel barrel, this upper is optimized to fully burn propellant behind heavy subsonic bullets. Featuring an advanced non-reciprocating side-charging handle system, this receiver allows you to cycle the action naturally from the side while the charging handle stays stationary during firing sequence. The handguard setup is intentionally designed as suppressor-ready, allowing wide-diameter muzzle devices or suppressors to nest seamlessly inside the rail. Natively mounts to any standard Mil-Spec AR-15 lower receiver. Proudly 100% designed, machined, and precision-tested in the USA.
| Receiver | Gibbz Arms G4 LEFT HANDED Non Reciprocating Side Charging Billet Aluminum Receiver with Gen 2 Handle, M4 Feed Ramps, Type III Hardcoat Anodized Black |
|---|---|
| Charging Handle | Non-Reciprocating Side Charging System (Left-Side Ejection / Right Side Charger) |
| Bolt Carrier Group | Premium Left-Handed M16 Full Auto Profile, Nitride/Melonite Coated, Properly Heat-Treated, MPI Tested |
| Barrel Length & Steel | 6 Inch Micro Profile, 4150 Chrome Moly Vanadium Steel, Medium Contour, Melonite Treated |
| Caliber | 300 AAC Blackout (7.62x35mm) |
| Twist Rate | 1:7 Twist (Optimized for heavy subsonic loads and silencer stability) |
| Gas Operating Block | Pistol-Length System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube |
| Muzzle Device | Standard 5/8-24 Thread Pitch, A2 Muzzle Device with Crush Washer Pre-Installed |
| Handguard | 5 inch Free-Float M-LOK Rail, Slim Outer Profile, Premium 6061-T6 Aluminum |
| Manufacturing Origin | 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty |
The PRO2A Left Hand 6" 300 Blackout Side Charging Upper Receiver solves the three biggest headaches in modern short-barrel rifle or pistol builds: gas deflection, awkward handling gymnastics, and suppressor clearance. The 300 Blackout cartridge is structurally efficient, achieving near-complete powder burn in short barrels. This makes a 6-inch barrel setup incredibly potent for close-quarters applications without losing massive velocity footprints.
Choosing a dedicated left-handed system guarantees that gas pressure is funneled away from your face when shooting suppressed. Complemented by the rigid, easy-to-manipulate side-charging design, you can cycle clear malfunctions or charge the system effortlessly without pulling your eye off target optics. Backed completely by Pro2A Tactical's signature Lifetime Factory Warranty and built with 100% American craftsmanship, this premium upper assembly delivers an ergonomic, reliable performance baseline that typical right-handed conversions simply cannot mimic.
| SKU | P2ALNR300BLKBW5PIS6-BA |
|---|---|
| Barrel Length | 6 inch |
| Rifle Caliber | 300 Blackout |
| Manufacturer | Pro2A Tactical |
