PRO2A LEFT HAND 10.5" 350 Legend 1/16 Pistol Length NR Side Charging Melonite M-LOK AR-15 Upper
Product Overview
The PRO2A Left Hand 10.5" 350 Legend Barreled Upper Receiver brings dedicated left-handed ergonomics and optimized straight-wall cartridge performance into a premium, compact package. Engineered around a Gibbz Arms G4 Left-Handed Non-Reciprocating (NR) side-charging billet receiver, this system throws gas and spent casings safely away from southpaw shooters while ensuring fast, effortless manual cycling. Designed as a drop-in replacement upper, it features a premium liquid-nitrocarburized heavy barrel with an engineered single-large ramp system to ensure reliable extraction with straight-walled case configurations.
Key Features
- Dedicated Left-Hand Architecture: Engineered exclusively for southpaw shooters, utilizing a true left-ejecting receiver housing paired with an integrated left-side manual cycling assembly.
- Non-Reciprocating Right-Side Charger: Premium patented Gibbz Arms G4 billet receiver architecture ensures the side-charging handle remains completely stationary while firing to maintain completely unobstructed visual clearance under oversized precision optics or heavy thermal frames.
- Ultra-Compact Profile: 10.5-inch heavy target barrel configuration delivers massive close-range kinetic energy transfer from a highly maneuverable, lightweight footprint.
- Straight-Wall Compliance: Specifically optimized for the 350 Legend cartridge, making it an excellent compact choice for states or zones with restrictive straight-wall firearm hunting mandates.
- QPQ Melonite Extreme Armor: Barrel bore, chamber, and exterior are fully liquid nitrocarburized to exceed mil-spec chrome lining in surface hardness, heat dissipation, and corrosion resistance.
- Slim Profile M-LOK Workspace: Features a continuous top Picatinny rail interface seamlessly blended into a 9-inch free-floating M-LOK handguard for rigid optics and accessory mounting stability.
Technical Specifications
| Caliber / Chambering | 350 Legend (Straight-Walled Cartridge) |
|---|---|
| Barrel Length / Steel | 10.5 Inches / 4150 Chrome Moly Vanadium (CMV) Steel |
| Barrel Finish & Profile | QPQ Melonite / Black Nitride (Internal & External) — Heavy Profile |
| Twist Rate / Feed Ramps | 1:16 Twist / Engineered Single-Large M4 Feed Ramp Profile for Reliable Straight-Wall Case Feeding |
| Gas System Mechanics | Pistol Length Direct Impingement with a 0.750" Low-Profile Steel Gas Block |
| Upper Receiver Housing | Gibbz Arms G4 Left-Hand Non-Reciprocating (NR) Side Charging Billet Aluminum, Type III Hardcoat Anodized |
| Handguard System | 9-Inch Ultra-Lightweight Free-Float Aluminum M-LOK Rail System |
| Muzzle Configuration | Standard A2 Flash Hider / 5/8x24 TPI Thread Pitch |
| Manufacturing Origin | 100% Designed, Machined, and Assembled in the United States |
| Warranty Protection | Backed by Pro2A Tactical's Structural Lifetime Warranty |
Why Choose This Product?
Left-handed shooters building straight-wall firearms frequently struggle with gas blowback and standard right-side ejection obstacles. Pro2A Tactical solves this by matching an authentic left-eject billet housing with precision 350 Legend feeding architecture. This upper provides a highly maneuverable, lawful hunting alternative that delivers absolute comfort and unwavering mechanical cycling for left-handed operators.