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Step up to an exceptionally stable tactical and home-defense powerhouse engineered to maximize recoil control and terminal performance while retaining the familiar manual of arms of the AR platform. The P2A PATRIOT 16" 45 ACP Pistol Caliber Melonite M-LOK Rifle is a fully assembled, factory function-tested complete firearm built to deliver relentless downrange velocity and absolute structural stability right out of the box. While custom pistol caliber builds frequently struggle with violent bolt velocity, irregular feeding geometry, and component wear, this model achieves an ideal engineering sweet spot by pairing a full-length precision 16-inch 4150 CMV steel blowback barrel with a standard rifle recoil layout. By matching internal component architecture with a custom heavy-duty bolt carrier group and heavy pistol caliber carbine buffer setup, this profile safely tames velocity dynamics, resulting in an exceptionally smooth direct blowback recoil pulse, minimal muzzle flip, and cleaner case extraction. Chambered in the legendary, hard-hitting 45 ACP caliber, this platform is optimized with a standard twist rate to confidently stabilize duty and defensive projectiles. Featuring a lightweight free-float M-LOK rail, an adjustable 6-position stock assembly, and a dedicated Glock-style magazine layout, this turnkey AR carbine completely eliminates assembly stress and building frustrations. Proudly 100% designed, machined, and precision-assembled in the USA with a Pro2A Tactical Lifetime Factory Warranty.
| Caliber | 45 ACP |
|---|---|
| Barrel Length & Steel | 16 Inch Medium Profile, 4150 Chrome Moly Vanadium Steel, Melonite Treated |
| Twist Rate | 1:16 Twist (Optimized to fully stabilize standard and defensive grade heavy projectiles) |
| Upper Receiver | AR-15/AR-45 Billet Aluminum, Slick Side Profile, Ejection Port Optimized for Pistol Calibers, Type III Hardcoat Anodized Black |
| Lower Receiver | Dedicated AR-45 Mil-Spec Billet 7075-T6 Aluminum, Glock Magazine Well Compatible, Type III Hardcoat Anodized Black Finish |
| Gas Operating Block | Direct Blowback System (No Gas Block Required) |
| Muzzle Device | Standard 5/8-24 Thread Pitch, Premium Big Bore A2 Flash Hider with Crush Washer Pre-Installed |
| Handguard Rail | 12" Slim Free-Float M-LOK Handguard, Machined from 6061-T6 Aluminum with Top Picatinny Rail |
| Bolt Carrier Group | Dedicated 45 ACP Blowback Bolt Assembly, Heavy Duty Two Piece Construction, Nitride/Melonite Treated, Glock Compatible |
| Charging Handle | Standard Milspec AR-15 Charging Handle |
| Lower Parts Kit | Complete Mil-Spec Lower Parts Kit (LPK) with Crisp Single-Stage Fire Control Group and Standard A2 Grip |
| Stock Assembly | 6-Position Adjustable M4 Stock, Mil-Spec Carbine Buffer Tube, Heavy 8oz PCC Buffer, Extra Power PCC Buffer Spring, Castle Nut, Latch Plate |
| Magazine | (1) Factory Original Glock Magazine |
| Manufacturing Origin | 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty |
The P2A PATRIOT 16" 45 ACP M-LOK Rifle directly solves the most common technical issues encountered with standard custom pistol caliber builds: violent cycling, sub-optimal feeding angles from mismatched lower units, harsh concussive feedback, and part-by-part tolerance stacking. When constructing specialized direct-blowback platforms from mismatched manufacturers, builders frequently fight feed failures, light primer strikes, or cycling headaches due to inconsistent bolt weights and spring ratios. Pro2A Tactical completely eliminates these engineering frustrations by headspacing, aligning, and function-testing the entire operating block as a single unit, ensuring that the heavy blowback bolt, barrel extension, feed ramps, muzzle device, and buffer system interface flawlessly right out of the box.
Furthermore, choosing a 16-inch barrel optimized for the .45 ACP cartridge strikes the ultimate operational sweet spot for heavy kinetic energy transfer and extended platform control. Originally engineered to maximize downrange velocity while maintaining a stable, compliant shoulder footprint, this configuration pairs perfectly with a specialized heavy PCC buffer framework. This setup broadens mechanical dwell structures, tames bolt speeds, smooths out case extraction, and drastically minimizes felt muzzle flip, allowing for comfortable, high-volume fire during intense training routines, home-defense scenarios, or match competitions.
Partnering with some of the best manufacturers in the industry, we bring you a line of rifles and pistols with unrivaled quality for the cost, the “Patriot”. Every Patriot firearm is carefully built and assembled by our team of experienced armorers who knows the importance of reliability and repeatability. Every component is manufactured to milspec or better standards to ensure a high quality firearm is produced. Whether it is for sporting, hunting, or recreational needs, our Patriot Line of rifles and pistols is more than capable to live up to the task. The Patriot line combines quality with affordability because every patriot deserves it.
| SKU | P2APAT-45ACPAX12OO16-1.16-HT |
|---|---|
| Model | PATRIOT |
| Barrel Length | 16 inch |
| Pistol Caliber | 45 ACP |
| Manufacturer | Pro2A Tactical |
