PRO2A LEFT HAND 12.5" 300 Blackout 1/8 Pistol Length Melonite M-LOK AR-15 Upper with Flash Can
Product Overview
Optimize your short-barreled build with the PRO2A Left Hand 12.5" 300 Blackout Pistol Length Melonite M-LOK Upper with Flash Can. Engineered exclusively for Southpaw operators, this fully assembled complete upper receiver brings the heavy-hitting, easily suppressed characteristics of the 300 BLK cartridge to a true left-ejecting platform. Featuring a 12.5-inch 4150 CMV Melonite barrel, a premium 15-inch free-float M-LOK rail, and an integrated slimline blast-forwarding flash can, this premium system is compatible with any standard AR-15 lower receiver configured as a pistol or a registered Short Barreled Rifle (SBR).
Key Features
- Dedicated Left-Hand Ejection Port: Mirrored receiver architecture forcefully ejects spent casings and harsh blowback gas to the left side, securing a clean, distraction-free sightline for left-dominant shooters.
- Blast-Forwarding Flash Can: The linear muzzle device pushes unburnt powder, bright flash, and concussive sound waves straight downrange, drastically lowering shooter fatigue during close-quarters or covered operations.
- Maneuverable 12.5-Inch Barrel Length: Supplies the ideal dwell time and velocity curve for both subsonic hunting rounds and supersonic tactical ammunition in a compact frame.
- Premium Melonite (QPQ Nitride) Finish: The high-grade 4150 CMV barrel is treated inside and out with a uniform Melonite layer for maximum surface hardness, heat tolerance, and total defense against rust.
- Extended Free-Float M-LOK Handguard: A slim 15-inch lightweight handguard fully shrouds the pistol-length gas block and matches the profile of the flash can, maximizing modular attachment space for lights, lasers, and optics.
Technical Specifications
| Caliber / Chamber | 300 AAC Blackout (7.62x35mm) |
|---|---|
| Barrel Length | 12.5 Inches |
| Barrel Material | 4150 Chrome Moly Vanadium (CMV) Steel |
| Twist Rate | 1:8 Twist Button Rifled |
| Barrel Finish | Melonite / QPQ Nitride Finish |
| Gas System Length | Pistol-Length Gas System with 0.750" Low Profile Gas Block |
| Upper Receiver | Left-Hand Ejection Forged 7075-T6 Aluminum, M4 Feed Ramps, Type III Hardcoat Anodized |
| Handguard | 15" Premium Slim Free-Float M-LOK Handguard (6061-T6 Aluminum) with Full Top Picatinny Rail |
| Muzzle Thread & Device | 5/8x24 TPI; Premium Slimline Blast-Forwarding Linear Flash Can |
| Manufacturing Origin | 100% Made in the USA; Lifetime Warranty Included |
Why Choose the PRO2A Left-Handed 300 Blackout Flash Can Upper?
The 300 Blackout cartridge excels in short-barreled configurations, making it a premier defensive choice. However, for a left-handed shooter, firing this high-pressure, gas-heavy system out of a traditional right-hand ejection port leads to harsh blowback debris venting directly across the face. The Pro2A Tactical Left-Hand Upper Assembly solves this issue completely by combining a safe left-ejecting port with a linear flash can that drives lingering concussive energy downrange. Built with a premium Melonite-treated barrel and a factory-matched left-hand BCG, this complete, range-tested setup delivers accurate big-bore performance alongside optimized shooter comfort.
