PRO2A 5" 9mm 1/10 Pistol Caliber Melonite M-LOK Upper | Pro2A Tactical

PRO2A 5" 9mm 1/10 Pistol Caliber Melonite M-LOK Upper

SKU: P2A-5-9MM-MEL-MLOK

Product Overview

The PRO2A 5" 9mm 1/10 Pistol Caliber Melonite M-LOK Upper is a premium, micro-sized complete upper receiver assembly designed to deliver maximum maneuverability and quick response times for the AR-9 platform. Centered around a compact 5-inch 4150 CMV steel barrel treated with a rugged Melonite finish, this system maximizes concealment and handling agility without sacrificing close-range velocity. Arriving fully assembled and a free-float M-LOK handguard, this upper drops directly onto any dedicated AR-9 lower or standard lower utilizing a 9mm magazine conversion block.

Key Features

Ultra-Compact Micro Footprint: The short 5-inch profile maximizes mobility, vehicle egress speed, and tactical retention inside highly confined defensive layouts.
Rugged Melonite Barrel Armor: Liquid QPQ Nitride treatment yields an exceptionally hard, low-friction bore surface to ensure easy cleaning sequences and long-lasting throat longevity.
Optimal 1/10 Twist Rate: Precision button rifling delivers uniform projectile stabilization tailored perfectly for both standard and heavy sub-sonic 9x19mm ammunition options.
Slim Free-Float M-LOK Handguard: Full-length modular rail system provides ample real estate for lights, hand stops, or optics while keeping front-end weight exceptionally low.

Technical Specifications

Caliber / Chamber:	9mm Luger (9x19mm / Parabellum)
Barrel Length:	5 Inches
Barrel Material:	4150 Chrome Moly Vanadium Steel
Twist Rate:	1:10 Right-Hand Twist Button Rifled
Barrel Coating Finish:	QPQ Melonite / Black Nitride Finish
Operating System:	Direct Blowback Systems Configuration
Upper Receiver Type:	Billet 7075 Slick Side Aluminum, Ejection Port Sized for PCCs (Type III Hardcoat Anodized)
Muzzle Threads & Device:	1/2x28 TPI; A2 Flash Hider
Handguard Interface:	4 Inch Free-Float Ergonomic Ultra-Slim M-LOK Rail System with Continuous Top Picatinny Rail Layout
Manufacturing Origin:	100% Made in the USA

Why Choose This Product?

This premium standalone upper receiver removes the cycle testing guesswork out of building a reliable, soft-shooting pistol caliber carbine (PCC) or pistol configuration. By pairing a precisely headspaced, ramped 9mm blowback bolt group with a rigid micro-barrel design, it provides uniform cartridge cycling and reliable extraction over a wide variety of factory loads and magazine configurations. Built entirely with premium USA-made components and precision-inspected to guarantee optimal tolerances, this micro upper offers an ultra-agile defensive solution that delivers professional-tier performance straight out of the box.

More Information