PRO2A LEFT HAND 10.5" 350 Legend 1/16 Pistol Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can Kit
Product Overview
The PRO2A Left Hand 10.5" 350 Legend Master Upper Kit delivers a high-performance, dedicated southpaw building option for the popular straight-walled cartridge. Engineered around a premium Gibbz Arms G4 Left-Handed Non-Reciprocating (NR) side-charging billet receiver, this system throws gas and spent casings safely to the left while keeping the cycle path completely independent of optics. Featuring an integrated muzzle-mounted linear flash can tucked under an extended handguard, this master build package comes completely populated with an optimized **left-handed Bolt Carrier Group (BCG)**, a full Mil-Spec **lower parts kit (LPK)**, and an adjustable **rear receiver pistol brace assembly** to remove all guesswork from your next custom hunting build.
Key Features
- All-Inclusive Master Build Kit: Bundles the complete barreled upper receiver with a premium bolt carrier group, charging handle, full lower parts kit, and rear receiver pistol brace assembly.
- 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 12-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 | 12-Inch Ultra-Lightweight Free-Float Aluminum M-LOK Rail System (Tucked Muzzle Look) |
| Muzzle Configuration | Premium Slimline Linear Flash Can / 5/8x24 TPI Thread Pitch |
| Bolt Carrier Group (BCG) | True Left-Hand Ejection M16 Profile, Case Hardened 8620 Steel Carrier, 9310 Steel Bolt (MPI Tested), Advanced Nitride Finish |
| Charging Handle | Integrated Left-Hand Non-Reciprocating Side Charging Handle Assembly |
| Lower Parts Kit (LPK) | Complete AR-15 Lower Parts Kit (Standard Milspec ELG Trigger / Fire Control Group, Pistol Grip, Detents, Springs, Pins, and Safety Selector) |
| Brace & Buffer Assembly | Premium Adjustable Pistol Stabilizing Brace, Pistol Receiver Extension Tube, Carbine Recoil 3oz Buffer, and High-Tensile Buffer Spring |
| 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 operators building straight-wall firearms frequently struggle with standard right-side ejection obstacles, face gas blowback, and face severe blast from compact configurations. Pro2A Tactical solves this comprehensively by combining an authentic left-eject billet side charger with an optimized 350 Legend single-ramp chamber and a linear flash can that pushes all concussion directly downrange. Complete with every sub-component matching this specialized layout, it stands as the ultimate, uncompromised master kit for southpaw marksmen.