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Are you at least 18 years old?
Are you at least 18 years old?
The PRO2A 5" 45 ACP 1/16 Pistol Caliber Melonite M-LOK Upper delivers hard-hitting, large-bore impact inside an ultra-compact sub-chassis configuration. Chambered in the iconic, low-velocity .45 ACP cartridge, this upper receiver assembly is built explicitly for dedicated pistol caliber carbine (PCC) platforms. Featuring a micro 5-inch premium steel barrel and an agile free-float handguard, this setup optimizes handling dynamics in close quarters. It provides a reliable direct-blowback configuration that functions beautifully as a lightweight personal defense weapon (PDW), home defense tool, or compact range build.
| Operating System: | Direct Blowback Mechanical Compatibility |
| Caliber / Chamber: | 45 ACP |
| Barrel Length & Contour: | 5 Inches Micro Profile Taper |
| Barrel Material: | 4150 Chrome Moly Vanadium Steel - Made for us by Alpha Shooting Sports |
| Twist Rate: | 1:16 Twist Ratio Profile |
| Barrel Coating Finish: | QPQ Melonite / Black Nitride Corrosion-Resistant Exterior and Interior Lining |
| Muzzle Device: | Standard 5/8-24 A2 Big Bore Flash Hider Profile |
| Upper Receiver Type: | Mil-Spec Billet Aluminum Slick-Side Receiver (Type III Hardcoat Anodized) |
| Handguard Type: | 4 Inch Slim Free-Float Modular M-LOK Rail System with Continuous Top Picatinny Section |
| Manufacturing Origin: | 100% Proudly Made in the USA |
When selecting a hard-hitting defense platform, the .45 ACP cartridge delivers incredible stopping power with minimal muzzle flash and a naturally subsonic signature. Firing this large-bore caliber out of a standard-length rifle can make the configuration unnecessarily heavy and slow to maneuver. The PRO2A 5" 45 ACP Upper eliminates this problem entirely by shrinking your setup into a lightning-fast micro package without sacrificing close-range impact energy.
By moving to a pure direct-blowback configuration, this upper drops the gas tubes and blocks that invite cycling failures, giving you a streamlined assembly that operates with rugged simplicity. Backed by top-tier US-made 4150 steel construction, a high-durability Melonite barrel shield, and a fast 1/16 twist explicitly dialed for heavy grain defensive bullets, this upper assembly provides operators with a smooth-operating and completely reliable compact powerhouse built to perform out of the box.
| SKU | P2A45ACPAX4OO5-ASS |
|---|---|
| Barrel Length | 5 inch |
| Pistol Caliber | 45 ACP |
| Manufacturer | Pro2A Tactical |
