Build an ultra-compact, high-performance Personal Defense Weapon (PDW) optimized completely for Southpaw operators with the PRO2A Left Hand 5" 300 Blackout NR Side Charging Upper Kit with Flash Can. This all-inclusive premium component package arrives ready for custom assembly on any standard mil-spec lower receiver. Featuring a fast 1/5 twist micro barrel to perfectly stabilize heavy subsonic rounds, a non-reciprocating left-hand side-charging upper receiver, a dedicated blast-forwarding flash can, a complete lower parts kit, and a pistol stabilizing blade buffer system, this layout offers unmatched close-quarters ergonomics and gas control.
Key Features
- Left-Hand Ejection & Side Control: Expels spent brass and hot gas away from left-handed shooters while the non-reciprocating side handle remains completely locked in place during cycling.
- Hyper-Fast 1/5 Barrel Twist: Specifically engineered to properly spin up and stabilize heavy subsonic bullets out of a micro 5-inch barrel, maximizing accuracy and terminal payload footprint.
- Recessed Linear Flash Can: Directs aggressive concussive blast energy and unburnt powder forward and away from the operator, producing a more comfortable shooting experience on short builds.
- All-In-One Assembly Bundle: Packaged as a complete build system including the micro upper assembly components, full lower small parts kit, and pistol stabilizing blade assembly.
- Melonite (QPQ) Protective Finish: Yields a diamond-hard, low-friction interior and exterior layer that fights off moisture, resists abrasive friction, and simplifies carbon cleaning.
Technical Product Specifications
- Caliber / Chamber: .300 AAC Blackout
- Barrel Length: 5 Inches (Micro Profile)
- Gas System Length: Micro-Length (expertly tuned for short-dwell cycling dynamics)
- Barrel Twist Rate: 1/5 Twist (highly optimized for stabilizing heavy subsonic projectiles in micro barrels)
- Barrel Material & Finish: 4150 Chrome Moly Vanadium with premium Melonite / Black Nitride QPQ treatment
- Upper Receiver Style: Gibbz Arms G4 Non-Reciprocating (NR) Left-Hand Side Charging Upper with Left-Side Ejection Port
- Bolt Carrier Group:Premium Left Hand Full Auto Profile, Nitride Finish, 9310 Bolt, 8620 Carrier, MPI Tested
- Handguard Structure: 7 Inch Free-Float Slim M-LOK Rail System with an integrated full-length top Picatinny rail
- Muzzle Device: 5/8-24 TPI Custom Linear Slimline Flash Can (recessed inside the rail to redirect concussion downrange)
- Gas Block Journal: 0.750" Low-Profile Gas Block and Micro Stainless Steel Gas Tube
- Lower Parts: Full Mil-Spec lower assembly components (Trigger, Hammer, Disconnector, Springs, Pins, Fire Selector, Bolt Catch, Magazine Release, and Pistol Grip)
- Pistol Blade Assembly: High-density polymer Stabilizing Blade Brace, Pistol Buffer Tube, Carbine Buffer Spring, Standard Buffer weight, Castle Nut, and Receiver End Plate
- Platform Compatibility: Standard AR-15 Mil-Spec lower platforms
- Manufacturing Quality: 100% Proudly Sourced and Assembled in the USA
Why Choose the Pro2A Tactical Left Hand 5" 300 Blackout NR Kit?
The Ultimate Southpaw Micro-PDW Architecture
Standard right-handed micro AR-15 builds subject left-handed operators to substantial facial gas blowback and flying brass. This dedicated left-hand side-charging configuration eliminates those compromise mechanics entirely. Shifting to an ergonomic left-side non-reciprocating handle allows you to manipulate or clear the system cleanly without losing your sight picture over optics or high magnification setups.
Maximizing the 300 Blackout Profile
The 300 Blackout cartridge achieves full powder burn in extremely short profiles. Combining a 5-inch barrel with a fast 1/5 twist rate creates a hyper-compact, lightweight firearm platform that fires heavy subsonic ammunition with exceptional stability—perfect for ultra-quiet home defense setups and highly mobile vehicular defensive roles.
Premium American Heritage and Complete Support
Pro2A Tactical avoids generic outsourcing. Every element of this package is sourced from leading domestic manufacturers and hand-curated out of Cumming, Georgia. This kit provides strict structural uniformity on the workbench, making it a reliable weapon system designed for a lifetime of rigorous use.*Click here to view our complete sourcing data, warranty criteria, and build safety guidelines.
