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Achieve optimal rifle ballistics paired with low-pressure subsonic cycling efficiency using the PRO2A LEFT HAND 16" 300 Blackout Upper Kit. Built from the ground up natively for left-handed operators, this non-NFA compliant rifle package utilizes a mirrored left-ejecting receiver profile and dedicated left-hand M16 bolt carrier group. By routing hot gas blowback and flying brass safely down the left side, it solves the persistent hazards that traditional southpaws face. Uniquely utilizing a pistol-length gas system on a full 16-inch barrel configuration, this setup yields maximum reliability when cycling heavy subsonic or lightweight supersonic projectiles. Combined with an all-inclusive lower receiver build group, this kit provides everything required to finish your custom southpaw hunting rifle.
| Upper Receiver | Billet Aluminum, M4 Feed Ramps, (Dedicated Left-Hand Ejection Port Setup), Type III Hardcoat Anodized Black |
|---|---|
| Charging Handle | Standard Mil-Spec Charging Handle |
| Bolt Carrier Group | Milspec Left-Hand M16 Full Auto Profile, .300 AAC Blackout Caliber, QPQ Nitride/Melonite Treated, MPI Tested, 8620 Carrier with 9310 Steel Bolt |
| Barrel Length & Profile | 16-Inch Medium Profile |
| Caliber | .300 AAC Blackout (Safely accepts both Subsonic and Supersonic factory loads) |
| Twist Rate | 1:7 Twist Rate (Highly optimized for stabilizing standard to heavy-weight hunting and match projectiles) |
| Barrel Material | 4150 Chrome Moly Vanadium Steel with QPQ Melonite Nitride Finish |
| Gas System | Pistol Length Direct Impingement with Low-Profile Gas Block |
| Handguard | 12-Inch Free Float Slim Profile M-LOK Handguard Rail System |
| Muzzle Device | Standard A2 Flash Hider, 5/8-24 TPI |
| Lower Parts Kit | Complete AR-15 Lower Parts Kit (LPK) including Pivot/Takedown Pins, Bolt Catch, Magazine Catch, Springs, Detents, Standard Pistol Grip, and Mil-Spec Fire Control Group (Trigger & Hammer Assembly) |
| Stock Assembly | M4 Carbine Adjustable Buttstock, 6-Position Mil-Spec Buffer Tube (Receiver Extension), Carbine Recoil Buffer, and Spring |
Most 16-inch 300 Blackout models utilize a carbine gas system, which can cause cycling hesitations with low-velocity subsonic loads. Pro2A Tactical remedies this by tuning a premium 16-inch barrel with a reliable pistol-length gas layout. Combined with an all-inclusive rifle-length stock bundle and true left-handed mechanical components, Pro2A Tactical removes the compromise from custom builds, ensuring southpaw shooters can step up to premium performance safely and comfortably.
| SKU | P2AL300BLKAX12PIS16-KM-KIT |
|---|---|
| Barrel Length | 16 inch |
| Rifle Caliber | 300 Blackout |
| Manufacturer | Pro2A Tactical |
