PRO2A 16" 6mm ARC Mid Length NR Side Charging Upper Receiver | PRO2A Tactical

PRO2A 16" 6mm ARC 1/7.5 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper

Product Overview

The PRO2A 16" 6mm ARC 1/7.5 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper delivers flat-shooting precision and modern tactical ergonomics in a streamlined, complete performance assembly. Chambered in the innovative 6mm Advanced Rifle Cartridge (6mm ARC), this upper receiver replaces traditional rear-charging handle limitations with a fluid, Non-Reciprocating (NR) side-charging layout. Featuring a premium 16-inch Melonite-treated barrel and a rigid slim profile free-float handguard, it provides an elite foundation for marksmen who demand long-range supersonic velocity, high-BC projectile tracking, and reliable cycling from a standard AR-15 frame configuration.

Key Features

Non-Reciprocating Side Charging: Fluid manual control handle remains completely stationary while the action cycles, giving you absolute structural clearance for optics without moving parts near your support hand.
6mm ARC Performance Edge: Squeezes maximum ballistic performance out of a standard-frame MSR, pushing high-BC projectiles with optimized supersonic efficiency and sub-MOA long-range accuracy.
Fast 1/7.5 Twist Rifling: Precision-rifled land pitch engineered to provide exceptional rotational stabilization for versatile 6mm hunting and match ammunition weight classes.
QPQ Melonite Case Hardening: Premium Salt Bath Nitride finish protects the internal bore and outer barrel surfaces against corrosive moisture, rapid thermal transfer, and surface tracking.
Balanced Mid-Length Gas Layout: Calibrated with a low-profile gas block to supply excellent dwell time, lowering internal component wear and softening the overall recoil impulse for rapid follow-up tracking.
Free-Float Slim M-LOK Handguard: Enhances intrinsic accuracy by completely isolating barrel harmonics, providing an expansive top Picatinny rail and clear M-LOK attachment slots for tactical gear.

Technical Specifications

Charging Mechanism:	Non-Reciprocating (NR) Side-Charging handle System
Caliber / Chamber:	6mm ARC (Advanced Rifle Cartridge)
Barrel Length & Contour:	16 Inches Medium Profile Taper
Barrel Material:	4150 Chrome Moly Vanadium Steel - Made for us by Tactical Kinetics
Twist Rate:	1:7.5 Twist
Barrel Finish:	QPQ Melonite / Black Nitride Corrosion-Resistant Coating
Gas System Length:	Mid-Length Gas System with 0.750" Low Profile Gas Block Set
Muzzle Device:	Standard 5/8-24 A2 Flash Hider
Upper Receiver Type:	Gibbz Arms G4 Billet Aluminum Side-Charging Receiver, Gen 2 Handle (Type III Hardcoat Anodized)
Handguard Profile:	12 Inch Slim Free-Float Modular M-LOK Rail Layout with Competition Top Picatinny Rail System
Manufacturing Origin:	100% Proudly Made in the USA

Why Choose This Product?

Traditional rear-charging handle systems force marksmen to break their cheek weld and drop out of their optical plane just to manipulate the bolt or clear a malfunction. The PRO2A 16" Side Charging 6mm ARC Upper completely eliminates this structural limitation, providing a fluid side-charging configuration that lets you cycle the action naturally while remaining locked behind your primary optic.

By stepping into the 6mm ARC cartridge, you gain a massive ballistic advantage, outperforming traditional small-bore rifle rounds in drop, wind drift, and terminal energy over deep distances while remaining within a lightweight, standardized frame package. Backed by heavy-duty 4150 steel construction, an ultra-durable QPQ Melonite coating, a matched side-charging BCG, and a smoother-cycling mid-length gas layout, this upper receiver assembly delivers a clean, reliable, and uncompromised precision upgrade ready to pin onto your lower receiver straight out of the box.

More Information

More Information
SKU	P2ANR6ARCACT12MID16-TK
Barrel Length	16 inch
Rifle Caliber	6mm ARC
Manufacturer	Pro2A Tactical

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