PRO2A LEFT HAND 16" 300 Blackout 1/7 Pistol Length Melonite M-LOK AR-15 Upper
Product Overview
Eliminate gas blowback compromises with the PRO2A Left Hand 16" 300 Blackout Pistol Length Melonite M-LOK Upper. Built specifically for left-handed precision shooters and hunters, this fully assembled complete upper receiver brings optimal ergonomics to the versatile 300 AAC Blackout platform. Combining a true left-ejecting forged receiver with a premium 16-inch 4150 CMV Melonite-treated barrel and a fast 1:7 twist rate, this assembly handles everything from light supersonic cartridges to heavy subsonic configurations cleanly. It pins directly onto any standard AR-15 lower receiver.
Key Features
- Dedicated Left-Hand Design: Specially machined receiver and ejection architecture direct empty casings, unburnt powder, and toxic facial blowback to the left side, out of the shooter's primary line of vision.
- Fast 1:7 Rifling Twist: Optimally stabilizing twist rate guarantees top-tier stability and precision groupings with heavy, high-grain subsonic ammunition, while maintaining flat-shooting tracking with supersonic cartridges.
- Pistol-Length Gas Architecture: Explicitly engineered to secure maximum gas dwell cycles, delivering exceptional reliability for mixed ammunition profiles, whether running a suppressor or unsuppressed.
- Premium Melonite / Nitride Surface: The high-grade 4150 CMV steel barrel features a complete inside-and-out liquid QPQ Nitride/Melonite coat for exceptional bore lifespan and total corrosion protection.
- Slim Free-Float M-LOK Handguard: A lightweight 12-inch aluminum handguard maximizes hand position real estate and supplies ample structural slots for tactical lighting, slings, or grips.
Technical Specifications
| Caliber / Chamber | 300 AAC Blackout (300 BLK) |
|---|---|
| Barrel Length | 16 Inches |
| Barrel Material | 4150 Chrome Moly Vanadium (CMV) Steel |
| Twist Rate | 1:7 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 | 12" Premium Slim Free-Float M-LOK Handguard (6061-T6 Aluminum) with Full Top Picatinny Rail |
| Muzzle Thread & Device | 5/8x24 TPI; Standard A2 Flash Hider |
| Manufacturing Origin | 100% Made in the USA; Lifetime Warranty Support |
Why Choose the PRO2A Left-Handed 16" 300 Blackout Upper?
The 300 Blackout is legendary for its adaptability, allowing shooters to cycle massive 220-grain subsonic bullets quietly alongside high-velocity supersonic deer hunting rounds out of the same platform. However, because the cartridge burns thick pistol powders, a left-handed operator using a traditional right-hand ejection receiver faces an immediate barrage of gas and debris—especially when running a suppressor. The Pro2A Tactical Left-Hand Upper Receiver Group completely resolves this problem. By balancing a clean left-ejection path with a fast 1:7 twist profile and factory test-fired component integration, Pro2A provides a reliable, flat-shooting, and remarkably comfortable big-bore hunting setup custom-tailored for Southpaw shooters.
