PRO2A 12.5" 350 Legend Pistol Length Melonite M-LOK Upper

PRO2A 12.5" 350 Legend 1/16 Pistol Length Melonite M-LOK AR-15 Upper

Product Overview

The PRO2A 12.5" 350 Legend 1/16 Pistol Length Melonite M-LOK AR-15 Upper strikes the absolute sweet spot between maximum handling maneuverability and straight-walled hunting performance. Chambered in the hard-hitting .350 Legend cartridge, this upper receiver assembly features a 12.5-inch barrel length that allows for complete powder efficiency of the straight-walled casing compared to ultra-short configurations. Built with a free-float slim profile M-LOK handguard and a reliable pistol-length gas layout, this drop-in hardware upgrade ready to pin directly onto any standard AR-15 lower receiver to provide dependable, lightweight accuracy in thick brush or open country.

Key Features

Balanced 12.5-Inch Profile: Yields optimal velocity retention and downrange energy transfer over short pistol platforms while preserving outstanding close-quarters handling speeds in dense brush.
Optimized 1/16 Twist Rate: Precision-rifled land profile engineered explicitly to rotationally stabilize common heavy hunting and defensive 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 elements.
Reliable Pistol Gas Calibration: Tuned pistol-length gas port paired with a low-profile gas block provides consistent pressure 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 M-LOK slots for accessories.

Technical Specifications

Caliber / Chamber:	350 Legend (Straight-Wall Regulation Compliant)
Barrel Length & Contour:	12.5 Inches Medium Profile
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 Length:	Pistol-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:	Mil-Spec Forged 7075-T6 Aluminum Receiver Assembly, Forward Assist & Port Cover (Type III Hardcoat Anodized)
Handguard Profile:	10 Inch Slim Free-Float Modular M-LOK Handguard Layout with Full Top Picatinny Rail Layout
Manufacturing Origin:	100% Proudly Made in the USA

Why Choose This Product?

For deer hunters and marksmen operating under straight-wall legislative limits, the 350 Legend offers an uncompromised balance of low recoil and massive close-to-medium range kinetic energy. While traditional 16-inch or 20-inch setups maximize power, they often become unwieldy inside compact tree stands or thick underbrush. Conversely, ultra-short barrels restrict full propellant combustion. The PRO2A 12.5" Upper hits the ultimate compromise—retaining excellent terminal expansion velocity while remaining light, fast, and remarkably fast-handling.

By pairing a heavy-duty US-made 4150 steel barrel with a tuned, low-profile pistol-length gas system, this upper receiver assembly dampens cycling forces down to a predictable, smooth push. Enveloped in an ultra-durable QPQ Melonite anti-corrosion barrier and finished with a rigid, lightweight free-float M-LOK rail system, 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.

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