PRO2A LEFT HAND 10.5" 350 Legend 1/16 Pistol Length Melonite M-LOK AR-15 Upper with Flash Can

Product Overview

The PRO2A LEFT HAND 10.5" 350 Legend 1/16 Pistol Length Melonite M-LOK AR-15 Upper with Flash Can brings optimized hunting energy and elite ergonomics into a compact, specialized package. Chambered in the powerful straight-walled 350 Legend cartridge, this complete upper receiver assembly utilizes a mirrored left-ejection design to route hot spent brass and gas blowback safely away from left-dominant eyes. To soften the intense concussion common with short large-bore setups, it incorporates an integrated project-forward Flash Can muzzle device tucked cleanly beneath the free-float rail. This setup strikes an exceptional balance between high velocity retention and close-range handling agility for straight-wall compliant hunting regions or home-defense builds.

Key Features

True Left-Hand Architecture: Features a dedicated left-ejecting upper receiver and a matched left-handed bolt carrier group to eliminate safety distractions and gas blowback for left-dominant operators.
Linear Flash Can Muzzle Device: Tames severe muzzle blast by forcing high-pressure sound energy, thermal expansion, and concussive shock directly downrange and completely away from the operator.
Optimal 10.5-Inch Pistol Profile: Delivers significant velocity advantages and downstream energy over standard micro configurations while preserving a highly maneuverable layout.
Precision 1/16 Twist Rate: Optimized explicitly to stabilize a versatile selection of common straight-walled .357-caliber hunting loads for tight, repeatable groupings.
QPQ Melonite Surface Hardening: Premium Salt Bath Nitride finish shields internal rifling and external steel surfaces against corrosive moisture, surface scoring, and high thermal transfer.
Tuned Pistol Gas Calibration: Paired with a low-profile gas block to guarantee positive straight-wall extraction, reliable dwell time, and exceptionally smooth cycling mechanics.

Technical Specifications

Receiver Orientation:	True Left-Handed / Left Ejection Port
Caliber / Chamber:	350 Legend (Straight-Wall Compliant)
Barrel Length & Contour:	10.5 Inches Medium Profile Taper
Muzzle Device:	5/8-24 TPI Slimline Linear Flash Can (Blast Forwarder Device) Tucked Under Handguard
Barrel Material:	4150 Chrome Moly Vanadium Steel - Made for us by Hitman Industries
Twist Rate:	1:16 Twist Ratio
Barrel Coating Finish:	QPQ Melonite / Black Nitride Finish
Gas System Length:	Pistol-Length Gas System with 0.750" Low Profile Gas Block
Upper Receiver Type:	Left-Hand Specific Billet Aluminum (Mil-Spec Type III Hardcoat Anodized)
Handguard Integration:	12 Inch Slim Profile Free-Float Modular M-LOK Rail System (Extended layout to partially tuck Flash Can)
Manufacturing Origin:	100% Proudly Made in the USA

Why Choose This Product?

The 350 Legend cartridge delivers low-recoil, heavy-hitting straight-wall energy to the AR platform, making it a stellar option for modern alternative pistols or short brush guns. However, traditional right-handed configurations force left-handed shooters to deal with heavy carbon exhaust gas blowback and hot brass flying past their face, while short-barreled setups generate punishing side concussion.

The PRO2A Left Hand 10.5" Upper completely solves these challenges. It combines uncompromised left-handed mechanics with an advanced blast-forwarding linear can that channels sound pressure and shock directly downrange away from your ears. Blending premium US-made 4150 steel construction, a high-durability Melonite barrel lining, and a stable 10.5-inch envelope, this assembly gives southpaw operators a smooth-cycling, highly integrated tactical powerhouse ready for field use straight out of the box.