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Are you at least 18 years old?
Are you at least 18 years old?
The P2A PATRIOT 16" 5.56 NATO Mid Length Heavy Barrel M-LOK Rifle - Unthreaded is a professional-tier tactical carbine custom-engineered to deliver maximum structural rigidity, heat dissipation, and match-grade target precision within a state-compliant framework. Chambered in the universally available, duty-proven 5.56 NATO caliber (fully backward-compatible with .223 Remington), this variant features a premium heavy barrel profile (HBAR) with a clean, unthreaded target crown muzzle. Explicitly designed to satisfy the strict local compliance guidelines of restrictive states that ban threaded barrels or muzzle devices, it provides shooters with complete peace of mind and an uncompromised tracking velocity layout. Calibrated with an optimized mid-length direct-impingement gas setup, this weapon system flattens internal pressure spikes cleanly to deliver soft-recoiling cycles, reliable case extraction, and lower reciprocating parts fatigue compared to compressed carbine gas loops. Finished in a rugged hardcoat anodized protective seal, this heavy barrel asset provides premium, non-stop operational performance.
**For States that require a heavy profile barrel and/or unthreaded muzzle**
| Caliber Compatibility | 5.56 NATO (Fully compatible with .223 Remington ammunition) |
|---|---|
| Barrel Length & Steel | 16 Inch Heavy Profile, 4150 Chrome Moly Vanadium Steel, Melonite Treated |
| Twist Rate | 1:7 Twist (Optimized to stabilize heavy duty 55gr to 77gr loads) |
| Upper Receiver | Milspec Forged 7075-T6 Aluminum, M4 Feed Ramps, Forward Assist & Dust Cover, Type III Hardcoat Anodized Black |
| Lower Receiver | Mil-Spec Forged 7075-T6 Aluminum, Type III Hardcoat Anodized Black Finish |
| Gas Operating Block | Mid-Length Gas System, Low-Profile Gas Block Machined from 4140 Steel, Stainless Steel Gas Tube |
| Muzzle Device | No Muzzle Device - Non Threaded - Target Crown |
| Handguard Rail | 12" Slim Free-Float M-LOK Handguard, Machined from 6061-T6 Aluminum with Top Picatinny Rail |
| Bolt Carrier Group | Full Auto M16 Profile, 8620 Carrier, 9310 Bolt, Nitride Treated, Properly Staked Gas Key, MPI Tested |
| 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 | Milspec Adjustable M4 Stock, 6 Position Carbine Buffer Tube, Standard 3oz Buffer, Buffer Spring andh Hardware |
| Magazine | (1) PMAG or Similar Compatible Magazine |
| Manufacturing Origin | 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty |
The P2A PATRIOT 16" 5.56 NATO Heavy Barrel Unthreaded Rifle solves the core operational challenges historically linked to state-compliant weapon builds: sacrificing accuracy, thermal stability, and mechanical capability to satisfy local laws. By engineering a solid heavy-profile contour with an unthreaded target crown, this model maximizes barrel stiffness and dampens muzzle movement naturally without relying on muzzle breaks or flash hiders. This allows you to print exceptionally tight groupings on paper or track varmints in the field with completely uniform thermal consistency.
Additionally, this platform matches premium structural weight with smooth weapon dynamics. By extending a full 15-inch free-float slim profile M-LOK handguard forward over a mid-length gas system, you gain complete freedom to implement customizable hand positioning and secure vital tactical bipods or precision optics without affecting barrel harmonics. Hand-assembled by an experienced team of armorers using precise headspacing alignments, this rifle represents an affordable, top-tier operational field asset engineered to remain accurate, legal, and incredibly reliable through an operational lifetime of hard use.
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-556GFS12MID16U-1.7-H-HT |
|---|---|
| Model | PATRIOT |
| Barrel Length | 16 inch |
| Rifle Caliber | 5.56 NATO |
| Manufacturer | Pro2A Tactical |
