PRO2A LEFT HAND 18" 350 Legend 1/16 Carbine Length Melonite M-LOK AR-15 Upper

Product Overview

The PRO2A LEFT HAND 18" 350 Legend 1/16 Carbine Length Melonite M-LOK AR-15 Upper is engineered explicitly for left-handed big-game hunters looking to maximize velocity and range from the popular straight-walled 350 Legend cartridge. Featuring a true mirror-image left-side ejection layout, this complete upper assembly routes hot brass, escaping gas, and ambient unburnt powder safely away from the shooter's line of sight. The balanced 18-inch barrel configuration stretches out your effective velocity profile to squeeze maximum energy out of your hunting loads, flattening downstream trajectories while keeping your rifle layout quick and responsive in tight brush.

Key Features

True Left-Hand Architecture: Engineered with a specialized left-ejecting receiver profile and dedicated left-handed bolt carrier group for optimal southpaw operator ergonomics and safety.
Extended 18-Inch Hunting Barrel: Premium 18-inch profile allows a more complete powder burn for straight-walled cartridges compared to shorter pistol configurations, flattening trajectories and maximizing downrange impact.
Optimized 1/16 Twist Rate: Precision rifling configuration designed explicitly for stabilizing common hunting grain variations of the rimless .357-caliber 350 Legend bullets.
Salt Bath Melonite Treatment: High-performance QPQ Melonite finish internally hardens the bore and protects external barrel surfaces from harsh, damp elements found on cold weather hunts.
Reliable Carbine Gas Calibration: Tuned carbine-length gas port paired with a low-profile gas block provides consistent pressure cycling with reliable straight-wall case extraction.
Free-Float Slim M-LOK Handguard: Enhances intrinsic accuracy by isolating barrel harmonics, providing an expansive top Picatinny rail and clear M-LOK attachment slots for optics and accessories.

Technical Specifications

Receiver Orientation:	True Left-Handed / Left Ejection Port Layout
Caliber / Chamber:	350 Legend (Straight-Wall Hunting Compliant)
Barrel Length & Contour:	18 Inches Medium Taper Profile
Barrel Material:	4150 Chrome Moly Vanadium Steel - Made for us by Tactical Kinetics
Twist Rate:	1:16 Twist Ratio
Barrel Coating Finish:	QPQ Melonite / Black Nitride Corrosion Resistance Finish
Gas System Profile:	Carbine-Length Gas System with 0.750" Low Profile Gas Block Set
Muzzle Device:	Standard 5/8-24 A2 Flash Hider, Enlarged to 35 Cal
Upper Receiver Type:	Left-Hand Specific Billet Aluminum (Mil-Spec Type III Hardcoat Anodized)
Handguard Integration:	15 Inch Slim Free-Float Modular M-LOK Rail System with Full Top Picatinny Rail Layout
Manufacturing Origin:	100% Manufactured in the USA

Why Choose This Product?

For hunters residing in strict straight-wall cartridge regulatory zones, the 350 Legend offers the ultimate balance of low recoil and devastating short-to-medium-range performance. However, traditional right-handed uppers degrade a left-handed shooter's focus by spraying hot brass and heavy carbon blowback directly across their path of vision. The PRO2A Left Hand 18" Upper remedies this entirely, providing a true purpose-built southpaw solution that safely routes exhaust gas away from your eyes.

By stepping up to an 18-inch Melonite barrel, this configuration gives you a noticeable velocity advantage over common shorter variants without the unwieldy length of a full 20-inch bench rifle. Backed by premium, US-made 4150 steel construction, a highly durable Melonite barrel lining, and a stable carbine gas system, this upper receiver assembly delivers clean, reliable, and uncompromised hunting performance straight out of the box.