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12.5 inch 300 Blackout Left Hand Side Charging Upper Kit

PRO2A LEFT HAND 12.5" 300 Blackout 1/8 Pistol Length NR Side Charging Melonite AR-15 Upper with Flash Can Kit

12.5 inch 300 Blackout Left Hand AR Upper Kit | Pro2a Tactical

PRO2A LEFT HAND 12.5" 300 Blackout 1/8 Pistol Length Melonite M-LOK AR-15 Upper with Flash Can Kit

PRO2A LEFT HAND 12.5" 300 Blackout 1/8 Pistol Length Melonite M-LOK AR-15 Upper Kit

Special Price $499.99 $719.99
Availability:
In stock
SKU
P2AL300BLKBW10PIS125-TK-KIT
PRO2A Left Hand 12.5" 300 Blackout Melonite M-LOK AR-15 Upper Kit

PRO2A LEFT HAND 12.5" 300 Blackout 1/8 Pistol Length Melonite M-LOK AR-15 Upper Kit

Product Description

Balance structural maneuverability with enhanced intermediate velocity using the PRO2A LEFT HAND 12.5" 300 Blackout Upper Kit. Purpose-built natively from the ground up for left-handed operators, this complete package completely eliminates cross-body brass throwing and facial gas blowback via its mirrored left-ejecting receiver system. The 12.5-inch medium profile barrel delivers optimized powder efficiency and an extended velocity curve for the versatile 300 Blackout round, utilizing a 1:8 twist rate to flawlessly stabilize heavy subsonic projectiles or fast supersonic defensive ammunition. Paired with a slim 12-inch free-float M-LOK handguard and an all-inclusive lower conversion package, this turnkey kit streamlines your entire custom southpaw build project.

Key Features

  • True Left-Hand Architecture: Dedicated mirrored left-ejection port setup protects left-handed operators from unmanaged gas blowback and hot cycling casings.
  • Enhanced 12.5-Inch Ballistics: Stretches powder burn efficiency to provide an effective velocity premium over shorter footprints while maintaining a quick-handling weapon profile.
  • Premium QPQ Melonite Protection: Liquid-nitride hardened 4150 Chrome Moly Vanadium steel barrel provides severe corrosion resistance and extended throat life.
  • Slim Free-Float M-LOK Handguard: Low-profile 12-inch aluminum rail system ensures superior ergonomics and continuous mounting space for optics, lights, and tactical accessories.
  • Turn-Key Lower Completion Package: Arrives alongside a complete matching lower parts kit and high-density blade assembly to finish your custom stripped lower out of the box.

Technical Specifications

Upper ReceiverBillet Aluminum, M4 Feed Ramps, (Dedicated Left-Hand Ejection Port Setup), Type III Hardcoat Anodized Black
Charging HandleStandard Mil-Spec Charging Handle
Bolt Carrier GroupMilspec Left-Hand M16 Full Auto Profile, .300 AAC Blackout Caliber, QPQ Nitride/Melonite Treated, MPI Tested, 8620 Carrier with 9310 Steel Bolt
Barrel Length & Profile12.5-Inch Medium Profile
Caliber.300 AAC Blackout (Safely accepts both Subsonic and Supersonic factory loads)
Twist Rate1:8 Twist Rate (Highly optimized for stabilizing standard to heavy-weight hunting and match projectiles)
Barrel Material4150 Chrome Moly Vanadium Steel with QPQ Melonite Nitride Finish
Gas SystemPistol Length Direct Impingement with Low-Profile Gas Block
Handguard10-Inch Free Float Slim Profile M-LOK Handguard Rail System
Muzzle DeviceStandard A2 Flash Hider, 5/8-24 TPI
Lower Parts KitComplete 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)
Blade AssemblyHigh Density Adjustable Blade, Pistol Buffer Tube (Receiver Extension), Carbine Recoil Buffer, and Spring

Why Choose This Product?

The 12.5-inch barrel layout extracts an exceptional balance of low-flash signature and optimized downrange kinetic retention from the 300 Blackout round. By merging custom-shop tolerances with an all-inclusive lower receiver build group and a mirrored southpaw action, Pro2A Tactical removes the structural compromises from left-handed firearms, delivering a balanced and face-safe project build.

More Information
SKU P2AL300BLKBW10PIS125-TK-KIT
Rifle Caliber 300 Blackout
Manufacturer Pro2A Tactical
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