PRO2A 5" 45 ACP 1/16 Pistol Caliber Melonite M-LOK Upper with Flash Can

Product Overview

The PRO2A 5" 45 ACP 1/16 Pistol Caliber Melonite M-LOK Upper with Flash Can offers a heavy-hitting, ultra-compact top-end solution engineered specifically for your custom AR-45 PCC platform. Built as a **standalone barreled upper receiver assembly only**, this 5-inch system maximizes large-bore terminal performance while maintaining a sub-compact footprint perfect for home defense and tight structural environments. Complete the build with your preferred or our 45 ACP bolt carrier group, charging handle, and dedicated pistol caliber lower assembly.

Key Features

Upper Receiver Assembly Only: Provides a flexible foundation for builders looking to source their own components and lower receiver configurations without purchasing redundant hardware.
Heavy-Hitting Micro Profile: A hard-hitting 5-inch profile brings maximum tactical mobility and close-quarters manipulation to the .45 Auto cartridge.
Precision 1:16 Twist Stability: Engineered to provide flawless rotational stabilization for standard 230gr FMJ and specialized heavy defensive hollow-point projectile profiles.
Concussive Flash Can Shielding: Integrated linear blast can completely encapsulates the short muzzle thread, forcing high-pressure gases and heavy blast sound downstream away from the operator.
Extended Free-Float Handguard: Features an ultra-lean modular M-LOK rail system that cleanly recesses the muzzle assembly underneath, extending your forward support grip real estate.
Liquid QPQ Melonite Preservation: Full-immersion nitriding infuses deep sub-surface defense across the 4150 CMV barrel steel, resisting sustained friction heat and harsh field humidity.

Technical Specifications

Upper Receiver	AR-15 Mil-Spec Billet Aluminum, Sized with Ejection Port Profiled for Large Pistol Calibers, Type III Hardcoat Anodized Black
Barrel Length & Profile	5-Inch Micro Profile
Caliber	45 ACP (Automatic Colt Pistol)
Twist Rate	1:16 Twist Rate (Highly optimized for standard and heavy-grain large bore ammunition weights)
Barrel Material	4150 Chrome Moly Vanadium Steel with Premium Melonite/QPQ Treatment
Gas System	Direct Blowback Architecture - No Gas Block or Gas Tube Required
Handguard	7-Inch Free Float Slim Profile M-LOK Rail System (Recesses muzzle assembly cleanly)
Muzzle Device	Slimline Blast-Forwarding Linear Flash Can (.578x28 Thread Pitch)

Why Choose This Product

Opting for this standalone 5-inch .45 ACP barreled upper receiver assembly grants you high-performance tactical performance without the cost of unneeded package extras. Transitioning muzzle blast forward via the integrated linear device remedies the aggressive lateral concussion common to micro pistol configurations, making it considerably more comfortable to shoot indoors or from behind cover. Manufactured entirely in the USA from premium grade alloys, this upper platform ensures reliable, heavy-hitting operational capability right out of the box.