PRO2A LEFT HAND 20" 6.8 SPC II 1/11 Rifle Length NR Side Charging Melonite M-LOK AR-15 Upper Kit
Product Overview
Take command of intermediate-range hunting and precision shooting with the PRO2A Left Hand 20" 6.8 SPC II Non-Reciprocating (NR) Side Charging Melonite M-LOK Upper Kit. Engineered specifically for Southpaw operators, this comprehensive rifle build package eliminates ergonomic compromises. Built around a premium, genuine Gibbz Arms Left-Handed Billet Upper Receiver and a velocity-maximizing 20-inch 4150 CMV Melonite barrel, this complete kit provides every component necessary—including a matched bolt carrier group, full lower parts package, and an adjustable stock—to transform your stripped lower receiver into a true left-handed hunting powerhouse.
Key Features
- True Left-Hand Architecture: Ejection port and receiver mechanics mirror left-side deployment, safely shedding hot brass and gas away from left-dominant eyes.
- Non-Reciprocating Left Side Charging: Genuine Gibbz Arms charging handle stays anchored during cycling. It optimizes clearing leverage and completely avoids mechanical interference with large thermal or variable magnification optics.
- 20-Inch Melonite Barrel: Built from premium 4150 CMV steel and treated internally/externally with a liquid Nitride barrier to provide elite throat life and superior environmental resistance.
- Optimized 1/11 Twist Rate: The specialized 1:11 twist rate perfectly handles popular mid-to-heavy grain 6.8 SPC II configurations (90gr to 120gr) to maintain extreme stability and precision downrange.
- Rifle-Length Gas System: Delivers an exceptionally smooth impulse curve, decreasing physical bolt velocity to minimize felt recoil and slow structural parts wear.
- Full Drop-In Completion Package: Arrives with an assembled upper receiver, left-hand side-charging BCG, complete lower parts kit (LPK) with fire control group, and a 6-position adjustable stock system.
Technical Specifications
| Caliber / Chamber | 6.8 SPC II (6.8mm Remington Special Purpose Cartridge) |
|---|---|
| Barrel Length | 20 Inches |
| Barrel Material | 4150 Chrome Moly Vanadium (CMV) Steel |
| Twist Rate | 1:11 Twist Button Rifled |
| Barrel Finish | Melonite / QPQ Nitride Finish |
| Gas System Length | Rifle-Length Gas System with 0.750" Low Profile Gas Block |
| Upper Receiver | Gibbz Arms G4 Left-Hand Ejection Non-Reciprocating Side Charging Billet Aluminum (Gen 2 Handle, Type III Hardcoat Anodized) |
| Handguard | 15" Premium Slim Free-Float M-LOK Rail (6061-T6 Aluminum) with Continuous Top Picatinny Rail |
| Muzzle Thread & Device | 5/8x24 TPI; Standard A2 Flash Hider |
| Bolt Carrier Group | Left-Hand Milspec M16 Profile BCG, Dedicated 6.8 SPC Face, Nitride Finish, MPI/HP Tested |
| Lower Parts Kit | Complete Mil-Spec Lower Parts Kit (LPK) with Fire Control Group (Trigger, Hammer, Springs), A2 Grip, and Safety Selection Pins |
| Stock Assembly | Mil-Spec Buffer Tube, Carbine Buffer, Spring, Castle Nut, End Plate, and 6-Position Adjustable M4 Stock |
| Manufacturing Origin | 100% Made in the USA |
Why Choose the PRO2A Left-Handed 6.8 SPC II Side Charging Kit?
The 6.8 SPC II delivers incredible ballistic efficiency, carrying optimal kinetic energy out to medium ranges inside a standard AR-15 footprint. However, finding high-quality configurations built natively for left-handed hunters is notoriously difficult, and standard right-handed conversions force lefties to deal with escaping port gas right in front of their eyes. Pro2A Tactical answers this challenge with an uncompromised design. By utilizing a premium Gibbz Arms left-handed billet side charger, manual operations are fast and seamless. Paired with a velocity-maximizing 20-inch Melonite barrel, a smooth rifle-length gas port layout, and an exact component package to finish your build, this kit offers an intuitive, safe, and hyper-accurate hunting firearm engineered specifically for Southpaws.
