Pro2A Left Hand 18" 7.62x39 Carbine Length Melonite M-LOK Upper Receiver Assembly

PRO2A LEFT HAND 18" 7.62x39 1/10 Carbine Length Melonite M-LOK AR-15 Upper

Description

The Pro2A Tactical Left-Handed 18-inch 7.62x39mm Complete Upper Receiver assembly maximizes muzzle velocity, downrange terminal energy, and smooth southpaw ergonomics on the AR-15 platform. Hand-assembled and quality verified in Georgia, this system replaces the standard layout with a dedicated left-side ejection port structure. Built around an extended 18-inch barrel profile that unlocks the full ballistic capability of the 7.62x39mm cartridge, it delivers a high-performance, drop-in option for southpaw operators looking to construct a premium hunting, target, or defensive rifle layout.

Key Features

True Left-Handed Architecture: Features a dedicated left-side ejection port design that protects southpaw shooters from flying gas blowback, hot brass, and concussive muzzle debris.
Extended 18-Inch Ballistics: Maximizes powder burn efficiency to push muzzle velocities and kinetic performance to its absolute limit, providing superior long-range tracking compared to shorter carbines.
Versatile 1/10 Twist Rate: Precision spun to comfortably stabilize standard 122gr and 123gr loads, alongside heavy supersonic and subsonic variants for elite downrange consistency.
Slim 15-Inch Modular Rail: Wrapped in a lightweight free-float M-LOK handguard that provides continuous accessory estate while ensuring the barrel stays free-floating.

Technical Specifications

Upper Receiver	Milspec Billet Aluminum M4 Flat Top Receiver, Left Hand Ejection, M4 Feed Ramps (Type III Hardcoat Anodized)
Barrel Length & Profile	18-Inch Medium Profile
Caliber	7.62x39mm
Twist Rate	1:10 Twist
Barrel Material	4150 Chrome Moly Vanadium Steel with Premium Corrosion-Resistant Melonite Finish
Gas System Length	Carbine Length Direct Impingement with 0.750 Low-Profile Gas Block
Handguard	15 Inch Free Float Slim Profile M-LOK Rail System with Integrated Top Picatinny Rail
Muzzle Thread & Device	5/8x24 Thread Pitch Standard A2 Flash Hider

Why Choose This Product?

Running a standard right-ejecting rifle platform with large-bore ammo like the 7.62x39 cartridge often forces left-handed operators to breathe in exhausting port gases or deal with stray brass crossing their field of vision. The Pro2A Left Hand 18" Upper addresses these tracking layout challenges completely by pairing factory-headspaced southpaw components with an enhanced feed ramp geometry optimized for steel and brass-cased ammunition alike. Coated inside and out in an ultra-hard Melonite treatment for peerless bore life and simple maintenance routines, it is the definitive solution for operators demanding custom-tier rigidity on a turnkey rifle configuration.