PRO2A 18" 350 Legend 1/16 Carbine Length Melonite M-LOK AR-15 Upper
Product Overview
The PRO2A 18" 350 Legend Carbine Length Barreled Upper Receiver steps up straight-wall ballistic velocity and downrange energy retention for dedicated hunting platforms. Purpose-engineered to extract peak velocity metrics out of modern straight-walled hunting cartridges, this drop-in replacement upper couples an extended 18-inch barrel configuration with a robust carbine-length gas profile to deliver consistent pressure performance. Built on a Mil-Spec forged receiver housing, it utilizes an engineered single-large ramp network to eliminate traditional straight-wall mechanical binding and ensure flawless extraction.
Key Features
- Ultra-Compact Profile: 18-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 15-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 | 18 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 | Carbine Length Direct Impingement with a 0.750" Low-Profile Steel Gas Block |
| Upper Receiver Housing | 7075-T6 Forged Aluminum, Mil-Spec M4 Profile, Type III Hardcoat Anodized, Forward Assist & Dust Cover |
| Handguard System | 15-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?
Upgrading to an 18-inch barrel configuration grants hunters maximum projectile acceleration and enhanced downrange accuracy while running standard straight-wall deer loads. Pro2A Tactical isolates historic cycling vulnerabilities by integrating a single broad feed ramp directly into a heavy-duty QPQ Melonite barrel system. Complete with an open, extended free-float handguard system perfect for bipods and thermal scopes, it stands as a premium, field-ready foundation designed for structural longevity.
