PRO2A 11.5" 5.56 NATO NR Side Charging M-LOK AR-15 Upper

PRO2A 11.5" 5.56 NATO 1/7 Carbine Length NR Side Charging Melonite M-LOK AR-15 Upper

Product Overview

The PRO2A 11.5" 5.56 NATO 1/7 Carbine Length NR Side Charging Melonite M-LOK AR-15 Upper delivers definitive close-quarters operational performance combined with exceptional structural ergonomics. This premium upper receiver drops traditional rear-charging limitations in favor of a smooth, Non-Reciprocating (NR) side-charging manual control layout. Engineered with a high-grade 11.5-inch Melonite-treated barrel, this upper receiver strikes the perfect intermediate balance between complete propellant burn, cycling dwell time, and fast maneuverability for custom pistol or SBR setups.

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.
Maneuverable 11.5-Inch Profile: Yields superior structural handling speeds and fast transition indexing in tight spaces while maintaining optimal duty-caliber ballistic velocity.
Versatile 1/7 Twist Rate: Precision-rifled land profile engineered explicitly to rotationally stabilize a vast array of common 5.56mm projectiles, including heavy mil-spec or defensive grain variations.
QPQ Melonite Surface Hardening: Premium Salt Bath Nitride finish shields internal rifling and external steel surfaces against corrosive moisture, rapid thermal transfer, and surface scoring.
Reliable Carbine-Length Gas Layout: Smooth direct-impingement cycling dynamics optimized to ensure maximum gas dwell time and fluid operation under demanding firing sequences.
Free-Float Slim Handguard: Enhances intrinsic accuracy by isolating barrel harmonics while supplying modular M-LOK attachment slots and an expansive top Picatinny rail.

Technical Specifications

Charging System:	Non-Reciprocating (NR) Side Charging Layout
Muzzle Device:	Standard A2 Flash Hider, 1/2-28 TPI
Caliber / Chamber:	5.56 NATO (Accepts .223 Remington projectiles reliably)
Barrel Length & Contour:	11.5 Inches Medium Profile
Barrel Material:	4150 Chrome Moly Vanadium Steel
Twist Rate:	1:7 Twist
Barrel Coating Finish:	QPQ Melonite / Black Nitride Corrosion-Resistant Exterior and Interior Lining
Gas System Length:	Carbine-Length Gas System with 0.750" Low Profile Gas Block
Upper Receiver Type:	Gibbz Arms G4 Billet Aluminum Side-Charging Receiver, Gen 2 Handle (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?

Short-barreled 5.56 platforms are highly maneuverable, but they often demand structural compromises. 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 11.5" Side Charging Upper eliminates this roadblock entirely, providing a fluid side-charging configuration that lets you cycle the action comfortably while staying completely locked onto your downrange target.

Furthermore, opting for an 11.5-inch barrel over an ultra-short 10.5-inch variant increases gas system dwell time. This structural shift lowers component wear, softens the overall recoil impulse, and provides reliable mechanical operation under standard firing cycles. Enveloped in a 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 simplifies configuration to provide a clean-cycling system built for standard service straight out of the box.

More Information

More Information
SKU	P2ANR556BW10CAR115-WLA
Barrel Length	11.5 inch
Rifle Caliber	5.56 NATO
Manufacturer	Pro2A Tactical

Reviews 1

PRO2A 11.5" 5.56 NATO 1/7 Carbine Length Melonite M-LOK AR-15 Upper with Flash Can