PRO2A Left Hand 13.7" 5.56 NATO NR Side Charging Upper with Flash Can | Pro2A Tactical

PRO2A LEFT HAND 13.7" 5.56 NATO 1/7 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can

Ultimate Left-Handed Ergonomics, Stationary Side Cocking, and Forward Blast Mitigation

Engineered from the ground up for Southpaw shooters demanding high-tier ergonomics, enhanced mechanical control, and comfortable field operation. The PRO2A Left Hand 13.7" 5.56 NATO Non-Reciprocating (NR) Side Charging AR-15 Upper with Flash Can fixes the fundamental limitations of standard right-handed short builds. Featuring a mirrored billet receiver platform, it throws spent shells to the left side while completely sealing off the receiver rear against gas blowback. Traditional rear charging latches are replaced by a robust, non-reciprocating side handle that stays stationary while firing. Built around an optimized mid-length 13.7-inch barrel, this upper integrates a premium linear flash can recessed inside an extended free-float M-LOK rail to drive muzzle concussion far downrange. It includes Pro2A Tactical's matching, left-hand side-charging bolt carrier group (BCG) and drops seamlessly onto any standard Mil-Spec AR-15 lower receiver. Proudly 100% designed, machined, and precision-assembled in the USA.

Key Features

True Left-Handed Ejection: Outfitted with a dedicated left-ejecting billet profile that directs unburnt powder and harsh gases away from left-dominant operators, keeping your vision and field of view clear.
Non-Reciprocating Side Charger (NRSC): The premium left-side manual cocking lever runs entirely independently from the bolt carrier's cycling path. The handle stays fully static while firing, protecting your support hand grip and optics workspace.
Integrated Linear Flash Can: Features a slimline muzzle blast diverter that captures high-pressure concussion, flame, and blast debris at the muzzle, safely pushing them forward away from the operator.
13.7-Inch Barrel (Pin & Weld Ready): Provides the perfect balance of intermediate portability and velocity, serving as a highly popular choice for pinning and welding an extended muzzle device to achieve a non-NFA 16" rifle length.
Smoother Mid-Length Gas Dwell: Tuning the system with a mid-length gas system limits severe port pressures, lowering extraction speeds for reduced component stress and an exceptionally soft recoil signature.
Melonite/Nitride Barrel Hardening: The heavy-duty 4150 CMV steel barrel is fully treated with an advanced Salt Bath Melonite finish inside and out, maximizing barrel life against gas erosion and shielding components from moisture.
Extended Free-Float M-LOK Handguard: Crafted from 6061-T6 aluminum, the extended rail cleanly overlaps the recessed flash can for a continuous, streamlined look while maximizing accessory mounting real estate.

Technical Specifications

Upper Receiver	Gibbz Arms LEFT HANDED G4 Non Reciprocating Side Charging Billet Aluminum Receiver with Gen 2 Handle, M4 Feed Ramps, Type III Hardcoat Anodized Black
Charging Style	Right-Side Non-Reciprocating Manual Cocking Assembly (Handle Stays Stationary While Firing)
Barrel Length & Steel	13.7 Inch Profile, 4150 Chrome Moly Vanadium Steel, Medium Contour, Melonite Treated
Caliber Compatibility	5.56 NATO (Fully compatible with .223 Remington ammunition)
Twist Rate	1:7 Twist (Optimized to stabilize heavy duty 62gr, 69gr, and 77gr match loads)
Gas Operating Block	Mid-Length System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube
Muzzle Device	Standard 1/2-28 Thread Pitch, Slimline Linear Flash Can Pre-Installed
Handguard Structure	15 Inch Free-Float M-LOK Rail, Full-Length Top Picatinny Rail, Machined from 6061-T6 Aluminum
Manufacturing Origin	100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty

Why Choose This Product?

The PRO2A Left Hand 13.7" 5.56 NATO NR Side Charging Upper with Flash Can is the ultimate all-in-one upgrade for Southpaw shooters seeking an ergonomic, high-speed intermediate defensive platform. Shorter barrels naturally amplify muzzle noise and concussive shockwaves sideways, a problem that traditional right-handed upper receivers make worse by throwing face-burning powder residue back at left-dominant operators. This system permanently eliminates both structural pain points by routing spent cartridges to the left side and driving muzzle blast completely downrange via the linear flash can.

More Information

More Information
SKU	P2ALNR556GFS15MID137CAN-BA
Barrel Length	13.7 inch
Rifle Caliber	5.56 NATO
Manufacturer	Pro2A Tactical

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