PRO2A 13.7" 5.56 NATO 1/7 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can
Product Overview
The PRO2A 13.7" 5.56 NATO Mid Length Barreled Upper Receiver with Flash Can brings structural ingenuity and high-performance ergonomics together into a sought-after compact footprint. Engineered around a premium Gibbz Arms G4 Non-Reciprocating (NR) side-charging billet receiver, this assembly eliminates the traditional rear charging constraint, delivering fast manual cycling independent of your optics workspace. Outfitted with a premium 13.7-inch Melonite barrel and a muzzle-mounted slimline linear flash can tucked beneath an extended free-float handguard, this upper drives concussive blast and audio resonance straight forward downrange.
Key Features
- Ultra-Compact Profile: 13.7-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 15-inch free-floating M-LOK handguard for rigid optics and accessory mounting stability.
Technical Specifications
| Caliber / Chambering | 5.56 NATO (Fully Compatible with .223 Remington) |
|---|---|
| Barrel Length / Steel | 13.7 Inches / 4150 Chrome Moly Vanadium (CMV) Steel |
| Barrel Finish & Profile | QPQ Melonite / Black Nitride (Internal & External) — Heavy Profile |
| Twist Rate / Feed Ramps | 1:7 Twist / M4 Feed Ramps Engineered for Flawless Cycle and Feeding Reliability |
| Gas System Mechanics | Mid-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 | 15-Inch Ultra-Lightweight Free-Float Aluminum M-LOK Rail System (Tucked Muzzle Look) |
| Muzzle Configuration | Premium Slimline Linear Flash Can / 1/2x28 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?
The 13.7-inch barrel platform has exploded in popularity because it offers optimal maneuverability while keeping custom pinning options open for full-length build legality. By driving cycle velocity down with a soft-shooting mid-length gas system and containing concussion within a tucked linear flash can, Pro2A Tactical delivers an incredibly flat-shooting experience. Built on a non-reciprocating side-charging billet receiver equipped with heavy-duty Gen 2 charging parts, it removes standard charging clearance obstacles, giving operators a premier, custom-grade upper baseline.
