PRO2A 12.5" 300 Blackout NR Side Charging M-LOK AR-15 Upper

PRO2A 12.5" 300 Blackout 1/8 Pistol Length NR Side Charging Melonite M-LOK AR-15 Upper

Product Overview

The PRO2A 12.5" 300 Blackout 1/8 Pistol Length NR Side Charging Melonite M-LOK AR-15 Upper delivers definitive close-to-mid range ballistic authority paired with state-of-the-art structural ergonomics. This premium upper receiver replaces traditional rear-charging configurations with a smooth, Non-Reciprocating (NR) side-charging manual control system. Engineered around a premium 12.5-inch Melonite-treated barrel with a versatile 1/8 twist rate, this system yields optimized powder burn, velocity preservation, and precise cycling control for an array of supersonic and subsonic loads.

Key Features

Non-Reciprocating Side Charging: Fluid manual control side handle remains completely stationary while firing, providing smooth operation without interfering with tactical optics, mounts, or tracking sightlines.
Versatile 12.5-Inch Profile: Yields superior velocity retention and downrange energy transfer over ultra-short pistol platforms while maintaining outstanding maneuverability in confined spaces.
Precision 1/8 Twist Rate: Precision-rifled land profile engineered explicitly to rotationally stabilize a vast spectrum of light supersonic and heavy subsonic .30 caliber projectiles.
QPQ Melonite Surface Hardening: Premium Salt Bath Nitride finish shields internal rifling and external steel surfaces against corrosive carbon buildup, high thermal stress, and surface wear.
Reliable Pistol-Length Gas Layout: Smooth direct-impingement cycling dynamics optimized to ensure consistent, clean gas pressure regulation and fluid operation across projectile weight variations.
Free-Float Slim Handguard: Enhances intrinsic accuracy by isolating barrel harmonics while supplying modular M-LOK attachment slots and an expansive top Picatinny tracking rail.

Technical Specifications

Charging System:	Non-Reciprocating (NR) Left-Side Charging Layout
Muzzle Thread Pitch:	5/8x24 TPI Standard A2 Flash Hider
Caliber / Chamber:	300 AAC Blackout (300 BLK)
Barrel Length & Contour:	12.5 Inches Medium Profile
Barrel Material:	4150 Chrome Moly Vanadium Steel
Twist Rate:	1:8 Twist
Barrel Coating Finish:	QPQ Melonite / Black Nitride Corrosion-Resistant Exterior and Interior Lining
Gas System Length:	Pistol-Length Gas System with 0.750" Low Profile Gas Block
Upper Receiver Type:	Gibbz Arms G4 Billet Aluminum Side-Charging Receiver, Gen 2 Handle, M4 Feed Ramps (Type III Hardcoat Anodized)
Handguard Profile:	10 Inch Slim Free-Float Modular M-LOK Rail
Manufacturing Origin:	100% Proudly Made in the USA

Why Choose This Product?

Maximizing the utility of the 300 Blackout cartridge often forces modern rifle builders into a trade-off between handling layout and velocity retention. Traditional rear charging handles force you to break your cheek weld and drop out of your optical plane just to manipulate the bolt. The PRO2A 12.5" Side Charging Upper eliminates this roadblock entirely, providing a fluid side handle that lets you effortlessly clear, check, or load a round while staying completely locked onto your downrange target.

While ultra-short configurations sacrifice essential velocity, this balanced 12.5-inch barrel preserves critical muzzle energy parameters needed for dependable bullet expansion at extended defensive distances while remaining highly nimble. Its pistol-length gas dynamics are specifically tuned for smooth operation behind variable projectile structures. Enveloped in an ultra-durable QPQ Melonite anti-corrosion barrier, matched with a rigid billet receiver, and finished with a lightweight free-float M-LOK rail system, this drop-in platform strips away build headaches to give you a clean-cycling precision powerhouse right out of the box.

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