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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 Kit

12.5 inch 300 Blackout Left Hand Upper Kit | Pro2a Tactical

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

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

Special Price $849.99 $1,134.99
Availability:
In stock
SKU
P2ALNR300BLKGFS15PIS125CAN-TK-KIT
PRO2A LEFT HAND 12.5" 300 Blackout 1/8 Pistol Length NR Side Charging Melonite AR-15 Upper with Flash Can Kit

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

Product Overview

The PRO2A LEFT HAND 12.5" 300 Blackout 1/8 Pistol Length NR Side Charging Melonite AR-15 Upper with Flash Can Kit is a comprehensive, mirror-engineered master build package purpose-built to deliver premium ergonomics and muzzle control for left-handed operators. Centered around a **Left-Eject Non-Reciprocating (NR) side-charging billet receiver**, this system isolates manual handle movement from internal cycling parameters while routing spent brass cleanly away from southpaw operators. This layout features an integrated blast-forwarding linear flash can recessed smoothly within an extended modular handguard. Fully populated with a matching left-handed full-auto profile bolt carrier group, dedicated side-charging handle assembly, complete lower parts matrix, and a robust polymer blade system, this kit removes all component matching guesswork entirely.

Key Features

  • All-In-One Complete Kit Pipeline: Consolidates your entire shopping list by providing the internal left-hand cycling mechanics, fire control group, lower frame small parts, and stabilizing furniture inside one premium assembly order.
  • True Left-Hand Architecture: Engineered with a dedicated left-side ejection port to prevent face-directed hot brass and gas blowback exposure for southpaw shooters.
  • Non-Reciprocating Left-Side Ergonomics: The charging handle stays completely stationary when firing, preserving your optic sight lines, mitigating optical obstruction, and accelerating manual cycle workflows.
  • Concussive Muzzle Redirection: Pre-installed slimline flash can drives expanding gas pressures and heavy sound concussion directly downrange, keeping the operator comfortable during closed-structure or indoor training.
  • Optimized 12.5-Inch Ballistic Profile: Harnesses superior muzzle velocity and powder efficiency over shorter micro configurations, offering hard-hitting downrange kinetic profiles while maintaining optimal maneuverability.
  • Versatile 1:8 Twist Stabilization: The precision-bored rifling flawlessly stabilizes multi-grain project envelopes, allowing seamless transitions across typical supersonic and heavy subsonic field combinations.
  • Extended Handguard Architecture: Extended free-float rail recesses the muzzle assembly cleanly beneath the handguard for maximum grip real estate and sleek aesthetic integration.
  • Sub-Surface Melonite QPQ Armor: Liquid-immersion nitriding infuses deep surface protection across the 4150 CMV steel barrel core, safeguarding critical lands and grooves from harsh throat attrition.

Technical Specifications

Upper ReceiverGibbz Arms G4 Billet 7075-T6 Aluminum, Dedicated Left-Hand Ejection Port, Non-Reciprocating Side Charging Layout, Type III Hardcoat Anodized Black
Charging HandleErgonomic Non-Reciprocating Right-Side Handle Assembly (Stays static during firing cycles)
Bolt Carrier GroupDedicated Left-Hand Full-Auto Profile BCG, Nitride Treated, 8620 Steel Carrier, Carpenter 158 Left-Hand Bolt, MPI Tested
Barrel Length & Profile12.5-Inch Medium Profile
Caliber300 AAC Blackout (300 BLK)
Twist Rate1:8 Twist Rate (Highly optimized for standard supersonic and heavy subsonic multi-grain configurations)
Barrel Material4150 Chrome Moly Vanadium Steel with Premium Melonite/QPQ Treatment
Gas SystemPistol Length Direct Impingement with Low-Profile Gas Block
Handguard15-Inch Extended Free Float Slim Profile M-LOK Rail System (Recesses muzzle assembly cleanly)
Muzzle DeviceSlimline Blast-Forwarding Linear Flash Can (5/8x24 Thread Pitch)
Lower Parts KitComplete AR-15 Lower Parts Kit (LPK) including Pivot/Takedown Pins, Bolt Catch, Magazine Catch, Springs, Detents, Standard Pistol Grip, and Polished Mil-Spec Fire Control Group (Trigger & Hammer)
Blade AssemblyHigh Density Polymer Adjustable Blade, Pistol Buffer Tube (Receiver Extension), Carbine 3oz Buffer, and Standard Buffer Spring

Why Choose This Product

This master package represents a significant leap forward for southpaw builders tired of modified right-hand operations. By integrating a dedicated left-eject receiver pathway with a non-reciprocating cocking handle layout, it completely eradicates face-directed gas blowback and unnatural manual manipulation. Transitioning weapon indexing to a fixed left-side lever removes the awkward mechanical controls of standard rear charging latches underneath large optics footprints, keeping manipulation workflows natural and fast. By pairing this custom control deck with a recessed linear blast forwarding device, you resolve the uncomfortable lateral concussions typical of short-barrel setups when training indoors. Packed with premium treated components from the dedicated left-hand full-auto profile bolt assembly down to the polished fire control links, this configuration ensures reliable performance out of the box. 100% proudly manufactured in the USA to unrelenting tactical standards.

More Information
SKU P2ALNR300BLKGFS15PIS125CAN-TK-KIT
Rifle Caliber 300 Blackout
Manufacturer Pro2A Tactical
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