PRO2A 10.5" 350 Legend 1/16 Pistol Length NR Side Charging Melonite M-LOK AR-15 Upper
Product Overview
The PRO2A 10.5" 350 Legend Barreled Upper Receiver pairs smooth, modern ergonomics with optimized straight-wall cartridge performance. Engineered around a premium Gibbz Arms G4 Non-Reciprocating (NR) side-charging billet receiver, this platform completely removes the traditional rear charging handle constraint to deliver fast manual cycling that won't interfere with large optics. Built as a high-performance drop-in upper, it features a heavy-profile Melonite barrel utilizing a specialized single-feed ramp configuration explicitly engineered to yield flawless straight-wall extraction and feed reliability.
Key Features
- Ultra-Compact Profile: 10.5-inch heavy target barrel configuration delivers massive close-range kinetic energy transfer from a highly maneuverable, lightweight footprint.
- Non-Reciprocating Side Charging Mechanics: Advanced side-charging handle design remains completely stationary during cyclic firing, eliminating moving external interferences and optimizing clearance for low-mounted optics and thermal scopes.
- 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) — Medium 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 |
| Charging System | Left-Side Non-Reciprocating Handle Assembly (Gen 2 Handle Components Included) |
| Upper Receiver Housing | Gibbz Arms G4 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?
Building a 350 Legend platform with a traditional charging layout often limits your workspace when running bulky thermal hunting scopes or large optics. Pro2A Tactical solves this explicitly by integrating a static, non-reciprocating side handle onto a billet upper assembly. Combined with custom single-ramp chambering geometry, it guarantees flawless cycle traction and maximum physical clearance, offering straight-wall hunters an uncompromised tactical advantage.
