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Step up to a long-range tactical and hunting powerhouse engineered to maximize downrange terminal velocity and structural accuracy within a proven large-frame format. The P2A PATRIOT 20" .308 Win Rifle-Length Stainless M-LOK AR-10 Rifle is a fully assembled, factory function-tested complete firearm built to deliver maximum downrange terminal performance and exceptional mechanical stability right out of the box. While shorter barrel platforms compromise kinetic impact, pressure management, and bullet stabilization thresholds at extended ranges, this model pairs a precision full-length 20-inch 416R Stainless Steel barrel with the universally trusted and devastating .308 Winchester cartridge. Natively engineered to maximize external ballistic coefficients and powder efficiency, this premium barrel configuration achieves superior velocity consistency, providing substantial energy footprint expansion, flat trajectory paths, and deeper target penetration. This heavy-caliber core is counterbalanced by a true rifle-length gas operating system. By extending internal gas pressure dwell time, this profile expands component cycle timing, resulting in an exceptionally smooth recoil pulse, cleaner case extraction, and significantly minimized muzzle rise. Featuring a lightweight free-float M-LOK rail and robust lower parts execution, this turnkey AR-10 rifle completely eliminates building stress. Proudly 100% designed, machined, and precision-assembled in the USA with a Pro2A Tactical Lifetime Factory Warranty.
| Caliber | .308 Winchester (Compatible with 7.62x51mm NATO) |
|---|---|
| Barrel Length & Steel | 20 Inch Heavy Contour Profile, Premium 416R Stainless Steel, Bead Blasted Satin Finish |
| Twist Rate | 1:10 Twist (Optimized to fully stabilize standard, hunting, and long-range match projectiles) |
| Upper Receiver | AR-10 DPMS Gen 1 High Profile, Billet 7075-T6 Aluminum, Type III Hardcoat Anodized Black, Forward Assist & Dust Cover |
| Lower Receiver | AR-10 Billet 7075-T6 Aluminum, Type III Hardcoat Anodized Black, DPMS Pattern, Integrated Trigger Guard Architecture |
| Gas Operating Block | Rifle-Length Gas System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube |
| Muzzle Device | Standard 5/8-24 Thread Pitch, Competition Muzzle Brake with Crush Washer Pre-Installed |
| Handguard Rail | 15" Slim Free-Float M-LOK Handguard, Machined from 6061-T6 Aluminum with Top Picatinny Rail |
| Bolt Carrier Group | Heavy Duty LR-308 / AR-10 Bolt Carrier Group, Full Auto Profile, Nitride Treated, Properly Staked Gas Key, MPI Tested |
| Charging Handle | Standard AR-10 Tactical Charging Handle |
| Lower Parts Kit | Complete LR-308 Lower Parts Kit (LPK) with Crisp Single-Stage Fire Control Group and Standard A2 Grip |
| Stock Assembly | 6-Position Adjustable Carbine M4 Stock with Milspec Carbine Buffer Tube, 3.8oz AR-10 Buffer, Extra Power Buffer Spring, and etc |
| Magazine Compatibility | (1) PMAG or Standard LR-308 / SR-25 Compatible Pattern Magazine |
| Manufacturing Origin | 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty |
The P2A PATRIOT 20" .308 Win Stainless M-LOK Rifle directly solves the most common technical issues encountered with standard large-frame custom rifle builds: violent cycling speed, sub-optimal pressure regulation, and part-by-part tolerance stacking. When constructing specialized precision heavy-caliber platforms from mismatched manufacturers, builders frequently fight hard extraction marks, ripped casing rims, or gas timing headaches due to inconsistent port diameters. Pro2A Tactical completely eliminates these engineering frustrations by headspacing, aligning, and function-testing the entire operating block as a single unit, ensuring that the bolt, barrel extension, gas port, and large-frame buffer system interface flawlessly right out of the box.
Furthermore, choosing a 20-inch barrel optimized for the .308 Winchester cartridge strikes the ultimate operational sweet spot for maximum muzzle velocity and long-distance capability. Originally engineered to push heavy projectiles to their peak velocity thresholds without losing flight geometry or structural stability, this length delivers flat trajectories and extended effective terminal footprints. Paired here with a smooth rifle-length gas operating system, this setup broadens the internal gas pressure dwell time, tames system cycling speed, smooths out case extraction, and drastically minimizes felt muzzle rise, ensuring exceptionally fast, accurate follow-up shots whether you are on the clock or tracking long-distance precision targets in the field.
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-308AX15RIF20SS-M-BA |
|---|---|
| Model | PATRIOT |
| Barrel Length | 20 inch |
| Rifle Caliber | 308 Win |
| Manufacturer | Pro2A Tactical |
