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20 inch AR-15 NR Side Charging 5.56 NATO M-LOK Melonite Upper

PRO2A 20" 5.56 NATO 1/7 Rifle Length NR Side Charging Melonite M-LOK AR-15 Upper

PRO2A 5" 5.56 NATO 1/5 Micro Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can

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Special Price $619.99 $869.99
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SKU
P2ANR556AXC65MIC5CAN-HT
PRO2A 5" 5.56 NATO 1/5 Micro Length NR Side Charging Melonite M-LOK Upper with Flash Can | Pro2A Tactical

PRO2A 5" 5.56 NATO 1/5 Micro Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can

Ultra-Compact PDW Firepower Combined with Non-Reciprocating Side Cocking Ergonomics

Achieve the absolute minimal platform footprint without compromising on manual ergonomics or bullet stabilization. The PRO2A 5" 5.56 NATO Micro Length Non-Reciprocating (NR) Side Charging Upper Assembly with Flash Can updates traditional AR-15 operations by moving manual manipulation to an intuitive left-side cocking lever. The charging handle remains completely stationary while firing, providing a seamless operating zone free from moving external components near your optic workspace or support hand. Built around an ultra-short 5-inch barrel configuration, this micro upper utilizes an aggressive 1:5 fast twist rate to solve the key projectile stabilization issues found on standard short-barrel 5.56 setups. Pre-equipped with a slimline linear flash can, it forces severe micro-barrel gas concussion and muzzle noise straight forward downrange away from the operator. Drops natively onto any standard Mil-Spec AR-15 lower receiver configured as a legal pistol or registered SBR. Proudly 100% designed, machined, and precision-assembled in the USA.

Key Features

  • Stationary Side-Charging Handle: The premium non-reciprocating left-side manual handle operates completely independently from the bolt carrier cycle. This allows for fluid charging from a prone or vehicle position and completely seals off the rear opening to block high-pressure backpressure gases from venting into your face.
  • Ultra-Fast 1:5 Twist Rate: Crucial for micro-length 5.56 setups, the aggressive 1:5 twist rate provides rapid rotational torque to properly stabilize standard-weight projectiles over a brief 5-inch rifling path, maintaining mechanical consistency and preventing keyholing.
  • Integrated Slimline Flash Can: Pre-installed on the muzzle to tame the sharp blast typical of micro-barrel configurations. It acts as a linear director, projecting noise, concussive pressure, and flash straight forward toward the target to maximize operator comfort.
  • Melonite/Nitride Barrel Protection: The heavy-duty 4150 CMV steel barrel is fully Nitride/Melonite treated inside and out. This premium chemical hardening vastly extends barrel life against aggressive micro-gas wear, aids thermal dissipation, and counters harsh field element corrosion.
  • Slim Profile Free-Float M-LOK Rail: Built from durable 6061-T6 aluminum, the free-float handguard completely isolates barrel vibrations to preserve uniform mechanical accuracy while offering extensive M-LOK attachment slots and a top Picatinny rail.

Technical Specifications

Upper Receiver Gibbz Arms G4 Non Reciprocating Side Charging Billet Aluminum Receiver with Gen 2 Handle, M4 Feed Ramps, Type III Hardcoat Anodized Black
Barrel Length & Steel 5 Inch Profile, 4150 Chrome Moly Vanadium Steel
Caliber 5.56 NATO (Compatible with .223 Remington ammunition)
Twist Rate 1:5 Twist (Optimized for short-barrel projectile stabilization)
Gas Operating Block Micro-Length System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube
Muzzle Device Standard 1/2-28 Thread Pitch, Pre-Installed Slimline Linear Flash Can Redirector
Handguard 6.5 Inch Slim Profile Competition Top Free-Float M-LOK Handguard, Extended Profile Partially Tucking the Muzzle Device, Machined from 6061-T6 Aluminum
Manufacturing Origin 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty

Who Chooses This Upper Receiver?

PDW, Truck Gun & Backpack Builders

Operators looking to build an ultra-compact Personal Defense Weapon (PDW) choose this setup to achieve maximum portability in vehicles, discrete storage packs, or tight quarters while maintaining full multi-shot intermediate rifle fire capabilities.

Tactical Indoor & Close-Quarters Shooters

Operators training inside confined environments or indoor lanes select this flash-can-equipped upper. It channels the aggressive acoustic concussion of the short 5" barrel completely forward and away from the shooter and adjacent lane partners, minimizing uncomfortably loud side-blast feedback.

Oversized Optics & Red Dot Operators

Marksmen running larger reflex sights, low-power variable optics (LPVOs), or thermal frames prefer side-charging platforms. The left-side handle clears the wide undersides of scope mounts, protecting hands from scrape damage during rapid charging manipulation.

More Information
SKU P2ANR556AXC65MIC5CAN-HT
Barrel Length 5 inch
Rifle Caliber 5.56 NATO
Manufacturer Pro2A Tactical
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