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

Product Description

The PRO2A Left Hand 13.7" 5.56 NATO Mid Length Melonite M-LOK Upper Receiver Assembly with Flash Can delivers maximum tactical portability within a strictly non-restricted rifle envelope, custom-configured for left-handed operators. Built with a mirrored upper receiver shell to throw spent casings and explosive blowback gases clear of southpaw shooters, this assembly features an extended linear blast-forwarding Flash Can permanently pinned and welded to the muzzle threads, successfully clearing the legal federal 16-inch overall civilian length requirement. Dropping seamlessly onto standard AR-15 lowers, it offers a highly optimized, flat-shooting tactical platform.

Key Features

True Left-Hand Architecture: Mirrored left-ejection layout routes spent shells and high-pressure blowback completely clear of left-handed operators' eyes and face.
Non-NFA Legal Compliance: Ultra-short 13.7-inch barrel is permanently extended past the standard civilian 16-inch threshold using a clean, professional pin-and-weld muzzle attachment procedure.
Blast-Forwarding Linear Flash Can: Mitigates harsh lateral concussion waves and pushes explosive muzzle flash, powder expansion gases, and sonic reports downrange directly toward targets.
Smoother Mid-Length Gas Profile: Implements an optimized gas port distance to drop cyclic bolt velocities, lowering mechanical recoil fatigue and minimizing interior fouling blowback.
Premium Melonite Structural Defense: Heavy-duty 4150 CMV steel is thoroughly liquid nitrided to secure supreme environmental corrosion resistance and a longer bore throat life.

Technical Specifications

Upper Receiver	Billet Aluminum, M4 Feed Ramps (Dedicated Left-Hand Ejection Port Setup)
Barrel Length	13.7-Inch Barrel (Permanently achieves 16-Inch Overall Length via Pinned & Welded muzzle device)
Caliber	5.56 NATO (Safely accepts .223 Remington)
Twist Rate	1:7 Twist Rate
Barrel Material	4150 Chrome Moly Vanadium Steel with QPQ Melonite Nitride Finish
Gas System	Mid Length Direct Impingement with Low-Profile Gas Block
Handguard	15-Inch Extended Free Float Slim Profile M-LOK Handguard Rail System (Recesses muzzle device cleanly)
Muzzle Device	Extended Slimline Linear Flash Can (Permanently Pinned and Welded / 1/2x28 Thread Base)

Why Choose This Product?

This premium 13.7-inch left-handed pinned and welded assembly offers the ultimate configuration for extreme maneuverability without breaking federal restrictions or dealing with short-barreled tax stamp processing. By pairing a soft-cycling mid-length gas system configuration with an integrated handguard-recessed linear blast device, it clears rear gas blowback and heavy face blast inherent to standard short builds. Wrapped inside a rigid free-floating M-LOK handguard that offers extra real estate for support hand placement, it equips southpaw home builders and professionals with a highly balanced, robust upper receiver built for hard-use dependability.