PRO2A 20" 350 Legend Carbine Length Melonite M-LOK Upper Receiver

PRO2A 20" 350 Legend 1/16 Carbine Length Melonite M-LOK AR-15 Upper

Product Overview

The PRO2A 20" 350 Legend 1/16 Carbine Length Melonite M-LOK AR-15 Upper introduces an advanced ballistic footprint engineered to maximize the full velocity, energy, and range potential of the straight-walled 350 Legend cartridge. Optimized for big-game hunters operating in strict regulatory zones, this complete upper receiver assembly stretches barrel length to a full 20 inches to deliver complete powder burn and peak kinetic force. Equipped with premium steel rifling and wrapped in an agile free-float handguard, this hardware upgrade drops directly onto any standard AR-15 lower receiver to provide dependable, flat-shooting accuracy in the timber or across open flats.

Key Features

Maximized 20-Inch Velocity Barrel: Extended length ensures complete propellant consumption for straight-walled powders, flattens downrange trajectories, and optimizes kinetic impact on target.
Optimized 1/16 Twist Rate: Precision-rifled land profile engineered explicitly to rotationally stabilize common heavy hunting grain variations of .357 straight-wall projectiles.
Salt Bath Melonite Treatment: Premium QPQ Melonite finish case-hardens internal bore surfaces and protects external steel against high-volume friction, heat scoring, and wet weather element exposure.
Reliable Carbine Gas Calibration: Tuned carbine-length gas system paired with a low-profile gas block provides consistent backpressure cycling with dependable straight-wall case extraction.
Free-Float Slim M-LOK Handguard: Enhances intrinsic accuracy by completely isolating barrel harmonics, providing an expansive top Picatinny rail and clear side M-LOK slots for accessories.

Technical Specifications

Caliber / Chamber:	350 Legend (Straight-Wall Hunting Regulation Compliant)
Barrel Length & Contour:	20 Inches Medium Taper Contour
Barrel Material:	4150 Chrome Moly Vanadium Steel - Made for us by Tactical Kinetics
Twist Rate:	1:16 Twist Ratio Profile
Barrel Coating Finish:	QPQ Melonite / Black Nitride Corrosion-Resistant Exterior and Interior Lining
Gas System Profile:	Carbine-Length Gas System with 0.750" Low Profile Gas Block Set
Muzzle Device:	Standard 5/8-24, Enlarged to 35 Cal, A2 Flash Hider
Upper Receiver Type:	Mil-Spec Forged 7075-T6 Aluminum Receiver, Forward Assist & Port Cover (Type III Hardcoat Anodized)
Handguard Profile:	15 Inch Slim Free-Float Modular M-LOK Handguard Layout with Competition Top Picatinny Section
Manufacturing Origin:	100% Proudly Made in the USA

Why Choose This Product?

For deer hunters and sport marksmen operating in straight-wall regulatory boundaries, the 350 Legend delivers an incredible balance of low felt recoil and massive close-to-medium range energy transfer. However, running this caliber out of common, short carbine lengths often truncates its full performance capability. The PRO2A 20" Upper remedies this entirely, providing an extended velocity advantage that yields premium downrange trajectories and more definitive anchor shots on target.

By pairing a heavy-duty US-made 4150 steel barrel with a precision-tuned carbine gas block, this upper receiver assembly dampens cycling forces down to a predictable, smooth push. Covered inside and out with a premium QPQ Melonite anti-corrosion barrier and equipped with a rigid, lightweight free-float M-LOK handguard, this drop-in platform strips away configuration headaches to give you a clean-cycling precision powerhouse built for severe field service straight out of the box.

More Information