PRO2A 18" 7.62x39 Carbine Length NR Side Charging Melonite Upper | Pro2A Tactical

Pro2A Tactical

PRO2A 18" 7.62x39 1/10 Carbine Length NR Side Charging Melonite M-LOK AR-15 Upper

Hard-Hitting .30-Caliber Power Coupled with Elite Stationary Charging Ergonomics

Maximize the ballistic potential and velocity scaling of the legendary 7.62x39 cartridge within the modular AR-15 footprint. The PRO2A 18" 7.62x39 Carbine-Length Non-Reciprocating (NR) Side Charging Upper Assembly alters traditional manual rifle manipulation. By substituting the standard rear dual-latch pull tab for an ergonomic left-side cocking lever, shooters can seamlessly charge or clear the chamber without breaking their cheek weld or shifting focus from downrange optics. The side-cocking handle remains completely stationary while the weapon fires, ensuring zero reciprocating components disrupt your support hand real estate. Built around an extended 18-inch 4150 CMV steel barrel, this setup provides full velocity efficiency over standard short configurations. It drops natively onto any standard Mil-Spec AR-15 lower receiver paired with standard 7.62x39 AR-15 magazines. Proudly 100% designed, machined, and precision-assembled in the USA.

Key Features

Stationary Side-Charging Handle: The premium non-reciprocating left-side manual handle operates completely independently from the bolt carrier cycle. This allows for fluid charging from prone or benched layouts and completely seals off the rear opening to block high-pressure gases from venting into your face.
Extended 18-Inch Muzzle Velocity: The 18-inch barrel profile ensures complete burn mechanics of the 7.62x39 powder matrix, harvesting greater muzzle velocity and foot-pounds of energy over 16-inch or shorter barrels for enhanced distance trajectories.
Melonite/Nitride Barrel Protection: The heavy-duty 4150 CMV steel barrel is fully Nitride/Melonite treated inside and out. This premium chemical hardening vastly extends barrel life against corrosive steel-cased primers, optimizes heat dissipation during long strings, and shrugs off harsh outdoor elements.
Optimized 1:10 Twist Rifling: Specifically button-rifled with a versatile 1:10 twist profile to maximize rotation on common 122gr, 123gr, and heavy sub-sonic .310/.311 diameter projectiles, ensuring consistent mechanical stabilization.
15-Inch Free-Float M-LOK Rail: Built from rigid 6061-T6 aluminum, the slim free-float rail isolates barrel harmonic stress to lock in uniform mechanical accuracy while offering expansive real estate for bipods, lights, and an uninterrupted top Picatinny configuration.

Technical Specifications

Upper Receiver	Gibbz Arms G4 Non Reciprocating Side Charging Billet Aluminum Receiver with Gen 2 Handle, M4 Feed Ramps, Type III Hardcoat Anodized Black
Barrel Length & Steel	18 Inch Medium Profile, 4150 Chrome Moly Vanadium Steel
Caliber	7.62x39mm
Twist Rate	1:10 Right-Hand Button Rifled Twist
Gas Operating Block	Carbine-Length System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube
Muzzle Device	Standard 7.62x39 Thread Pitch (5/8-24 Threads), A2 Flash Hider with Crush Washer
Handguard	15" Slim Profile Free-Float M-LOK Rail, Machined from 6061-T6 Aluminum
Manufacturing Origin	100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty

Who Chooses This Upper Receiver?

Heavy Bush, Hog & Deer Hunters

Hunters who value the dense brush-busting capabilities of the heavy .30-caliber 7.62x39 projectile choose this 18-inch barrel configuration to achieve optimal velocity. It ensures clean, ethical energy drop-offs on hogs and medium-sized game up to and past 200 yards.

Oversized Optics & Thermal Night Hunters

Predator and hog hunters running bulky low-power variable optics (LPVOs) or wide thermal sights prefer side-charging platforms. The left-mounted handle leaves massive clearance space below the scope base, preventing scraped knuckles against large mounts.

Cost-Effective High-Volume Trainers

Enthusiasts wanting to practice their manual of arms on a hard-hitting platform choose this setup. It utilizes highly economical and widely available 7.62x39 ammunition, allowing you to train with large-bore impact dynamics without paying premium intermediate-rifle cartridge costs.

More Information