PRO2A 16" 7.62x39 1/10 Carbine Length NR Side Charging Melonite M-LOK AR-15 Upper

Bring the heavy-hitting ballistic power of the classic 7.62x39mm cartridge to a modern, ergonomic layout with the PRO2A 16" Non-Reciprocating (NR) Side Charging AR-15 Upper Receiver Assembly. Engineered from the ground up for maximum shooter comfort and seamless cycling, this complete upper drops directly onto any standard Mil-Spec AR-15 lower receiver. By shifting the charging handle from the rear to the left side, it provides a much more intuitive manual of arms, especially when running large optics. Paired with a premium 4150 CMV steel barrel, a tailored carbine-length gas system, and an enhanced big-bore bolt face, it is built to handle steel-cased surplus or match brass ammo with absolute authority.

Key Features

Non-Reciprocating Side Charger: The side charging handle remains completely stationary while the weapon fires, protecting the shooter's hands and eliminating interference with mounted optics or cheek risers.
Advanced Melonite Barrel Protection: The high-grade 4150 CMV steel barrel is fully treated with an advanced Salt Bath Melonite finish inside the bore and across the exterior to resist corrosive primers and maximize service life.
Enhanced Firing Reliability: Outfitted with an optimized side-charging 7.62x39mm Bolt Carrier Group utilizing an extended, enhanced firing pin and a tailored bolt face to guarantee consistent primer ignition on hard steel-cased surplus ammunition.
Optimal 1:10 Twist Rate: Precision button-rifled with an optimized 1:10 twist configuration engineered specifically to stabilize standard 122gr, 123gr, and heavier variant 7.62x39mm projectiles with consistent long-range accuracy.
Modular M-LOK Handguard: A free-float, slim-profile aluminum M-LOK rail system provides a continuous top Picatinny rail and ample space for mounting tactical lights, lasers, and vertical grips.

Technical Specifications

Upper Receiver Assembly	Gibbz Arms G4 Premium Non-Reciprocating Side Charging Billet Upper Receiver, M4 Feed Ramps, Left-Side Handle Slot, Type III Hardcoat Anodized Black Finish
Charging Handle	Left-Side Non-Reciprocating Charging Handle Assembly (Stationary During Firing Cycle)
Barrel Component	16 Inch Profile, 4150 Chrome Moly Vanadium Steel, Medium Contour, Melonite Treated Interior & Exterior Bore
Caliber	7.62x39mm
Twist Rate	1:10 Twist
Gas Operating Block & System	Carbine-Length Gas System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube
Muzzle Device Component	Standard 5/8x24 Thread Pitch, A2 Birdcage Flash Hider with Crush Washer Pre-Installed
Handguard	12 Inch Slim Profile Free-Float Aluminum Handguard, Continuous Top Picatinny Alignment, Modular M-LOK Attachment Points
Manufacturing Origin	100% Assembled and Quality Checked in the USA with Pro2A Tactical Lifetime Factory Warranty

Why Buy This Product?

The PRO2A 16" 7.62x39 Non-Reciprocating Side Charging Upper directly solves the performance and compatibility issues that historically plagued 7.62x39mm conversions on standard AR frames. Many home builders encounter reliability issues due to hard primers and improper gas pressures. This kit addresses those challenges by integrating a specialized bolt face, an extended enhanced firing pin, and a tuned carbine-length gas port block right out of the box. Combined with a fluid left-side charging handle that avoids interference with large rifle scopes, it offers a flawless blend of classic heavy-caliber performance and modernized AR ergonomics.

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