PRO2A 10.5" .45 ACP 1/16 Pistol Caliber Melonite M-LOK Upper Kit
Product Overview
Build a hard-hitting, soft-shooting pistol caliber carbine with the PRO2A 10.5" .45 ACP 1/16 Pistol Caliber Melonite M-LOK Upper Kit. This premium, all-in-one package includes everything required to complete a stripped pistol caliber lower receiver into a functional firearm. Built around a robust 10.5-inch 4150 CMV Melonite-treated barrel and a modern slim free-float M-LOK handguard, this package balances compact ergonomics with the legendary stopping power of the .45 ACP cartridge.
Key Features
- Complete Drop-In Package: Comes complete with a fully assembled upper receiver, dedicated blowback Bolt Carrier Group (BCG), charging handle, complete lower parts kit (LPK), and 6-position stock assembly.
- Premium Melonite / Nitride Treated Barrel: The 4150 CMV steel barrel is treated inside and out with a liquid QPQ Nitride/Melonite process for ultimate surface hardness, corrosion protection, and long bore life.
- Optimized 1:16 Twist Rate: Precision button rifling is tailored perfectly to stabilize heavy, large-bore pistol cartridges ranging from standard 230gr ball ammo to modern defensive hollow points.
- Free-Float M-LOK Handguard: A slim, lightweight 10-inch handguard provides a continuous top Picatinny rail and ample M-LOK slot real estate for mounting sights, lights, vertical grips, and hand stops.
- Pistol Caliber Blowback Reliability: Designed to operate on a proven direct blowback mechanical system, removing the need for a complex gas block or tube layout while ensuring consistent extraction.
- 100% Made in the USA: Proudly manufactured, assembled, and quality-tested in the United States, backed by Pro2A Tactical's lifetime warranty.
Technical Specifications
| Caliber / Chamber | .45 ACP |
|---|---|
| Barrel Length | 10.5 Inches |
| Barrel Material | 4150 Chrome Moly Vanadium (CMV) Steel |
| Twist Rate | 1:16 Twist Button Rifled |
| Barrel Finish | Melonite / QPQ Nitride Finish |
| Gas System Length | Direct Blowback (No Gas Block or Tube Needed) |
| Upper Receiver | Billet Aluminum, Slick Side Profile (No Forward Assist/Deflector Needed for Pistol Calibers), Type III Hardcoat Anodized |
| Handguard | 9" Premium Slim Free-Float M-LOK Handguard (6061-T6 Aluminum) with Full Top Rail |
| Muzzle Thread & Device | 5/8x24 TPI; Standard A2 Style Flash Hider |
| Bolt Carrier Group | Dedicated .45 ACP Blowback BCG, Heavy Duty Single-Piece Carrier, Nitride Finished, Compatible with Glock or Colt Style Large-Bore Magazines |
| Lower Parts Kit | Complete Mil-Spec Lower Parts Kit (LPK) including Fire Control Group (Trigger, Hammer, Disconnector, Springs), Pistol Grip, and Safety Selector Assembly |
| Blade Assembly | Standard Adjustable Blade, Pistol Buffer Tube, Heavy Pistol Caliber 8oz Buffer, Carbine Spring, Castle Nut, End Plate |
| Origin & Warranty | 100% Made in the USA; Lifetime Warranty and Support |
Why Choose the PRO2A 10.5" .45 ACP Complete Upper Kit?
Building a reliable direct blowback pistol caliber carbine (PCC) in .45 ACP requires an exact mechanical balance between bolt mass, recoil spring tension, and barrel configuration. Sourcing these components independently often causes short-stroking, feeding hang-ups, or premature wear. The Pro2A Tactical 10.5" .45 ACP Complete Kit removes all structural guesswork. Every single part in this package—from the heavy-weight pistol caliber buffer to the ramped blowback bolt profile—is meticulously headspaced and balanced to run in seamless harmony. Delivering flat trajectories, mild felt recoil, and duty-ready reliability, this complete package is a premier option for an accessible home defense weapon or tactical range build.
