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

Southpaw Ejection Symmetry Paired with Premium Forward Blast Diversion

Engineered to deliver ultimate comfort, control, and blast reduction for left-dominant operators. The PRO2A Left Hand 13.7" 5.56 NATO Mid-Length Melonite Upper with Flash Can optimizes the standard AR-15 footprint for left-handed shooters. By mirroring the ejection path to the left side, this upper throws scorching gases, unburnt powder, and spent brass completely away from your face. Built around a 13.7-inch 4150 CMV steel barrel, it is paired with an integrated linear flash can recessed underneath an extended handguard. The flash can captures high-pressure concussion at the muzzle and drives it straight downrange. This complete receiver setup arrives ready to accept your preferred left-handed bolt carrier group and charging handle, mounting natively to any standard Mil-Spec AR-15 lower receiver. Proudly 100% designed, machined, and precision-tested in the USA.

Key Features

True Left-Handed Ejection: Features a dedicated mirrored upper receiver configuration that directs gas residue and shell debris away from left-handed eyes, solving the primary downside of right-handed tactical conversions.
Integrated Linear Flash Can: Outfitted with a premium muzzle blast diverter that gathers expanding gases and channels the horizontal sound signature and muzzle flash straight down the firing line.
13.7-Inch Barrel Architecture: The highly versatile 13.7" barrel profile maximizes portability and maneuverability while providing an ideal baseline length for legal 16" pin-and-weld muzzle device configurations.
Optimized Mid-Length Gas Dwell: Tuned with a mid-length gas system to stabilize internal carrier pressures, which smooths out component integration, extends parts lifespan, and creates a soft recoil impulse.
Melonite/Nitride Bore Finish: The heavy-duty 4150 CMV steel barrel undergoes an advanced Salt Bath Melonite process inside and out. This high-grade treatment increases surface slickness, shrugs off moisture, and fights off gas port erosion.
Extended Free-Float M-LOK Handguard: Machined from lightweight 6061-T6 aluminum, the extended rail wraps cleanly around the linear flash can for a streamlined aesthetic while maximizing accessory real estate.

Technical Specifications

Upper Receiver Style	Dedicated Left-Handed Ejection, Mil-Spec Billet Aluminum, M4 Feed Ramps, Type III Hardcoat Anodized Black Finish
Barrel Length & Steel	13.7 Inch Profile, 4150 Chrome Moly Vanadium Steel, Medium Contour, Melonite Treated
Caliber	5.56 NATO (Fully compatible with .223 Remington ammunition)
Twist Rate	1:7 Twist (Optimized to stabilize standard and heavy duty 62gr, 69gr, and 77gr tactical 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	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 Mid Length Upper with Flash Can offers a complete solution for left-handed shooters building an intermediate-range defensive rifle. Standard right-handed short barrels release significant muzzle concussion sideways while venting harsh debris directly backward into a left-handed shooter's face. This setup solves both issues simultaneously by utilizing a true mirrored left-handed receiver layout and a linear flash can that safely directs muzzle pressure downrange.

Choosing a 13.7-inch barrel paired with a mid-length gas system also provides exceptionally soft cycling behavior. This combination avoids the high bolt speeds common in carbine gas systems while maintaining a short, nimble front profile. The extended M-LOK handguard covers the flash can to ensure maximum support-hand rail space for lights, lasers, and tape switches. Backed completely by Pro2A Tactical's signature Lifetime Factory Warranty and built with 100% American craftsmanship, this upper delivers dedicated ergonomics and dependable reliability out of the box.