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The P2A HERO 12.5" 5.56 NATO 1/7 Mid Length Melonite M-LOK Rifle (SBR) is a professional-grade Short Barreled Rifle custom-engineered to deliver superior reliability, durability, and shootability in a compact NFA platform. Chambered in the industry-standard 5.56 NATO caliber (fully backward-compatible with .223 Remington), this legal short-barreled rifle leverages the widely regarded 12.5-inch barrel length as the ballistic sweet spot for short setups—offering excellent powder burn efficiency, higher muzzle velocity, and better terminal performance compared to shorter 10.5- or 11.5-inch configurations while retaining exceptional maneuverability. Built with premium billet 7075-T6 aluminum receivers that enhance structural rigidity and feature an improved flared magwell and integrated trigger guard for faster reloads and gloved operation, this HERO series model raises the standard set by the Patriot line. Equipped with a tuned mid-length direct-impingement gas system, Melonite-treated barrel, exclusive PRO2A 3.5lb trigger, and SOPMOD stock, it ensures smooth cycling, reduced felt recoil, and consistent accuracy under demanding conditions. Finished in Type III hardcoat anodized black, this build provides long-term corrosion resistance and field durability.
| Caliber | 5.56 NATO (Fully compatible with .223 Remington ammunition) |
|---|---|
| Barrel Length & Steel | 12.5 Inch Medium Profile, 4150 Chrome Moly Vanadium Steel, Nitride/Melonite Treated |
| Twist Rate | 1:7 Twist (Optimized to stabilize 55gr–77gr loads) |
| Upper Receiver | AR-15 Mil-Spec Machined out of 7075-T6 Billet Aluminum, M4 Feed Ramps, Type III Hardcoat Anodized Black with Forward Assist and Ejection Port Cover Installed |
| Lower Receiver | Mil-Spec AR-15 MACHINED out of 7075-T6 Billet Aluminum, Integrated Trigger Guard, Flared Magwell, Type III Hardcoat Anodized Black |
| Gas Operating System | Mid-Length Direct Impingement Gas System, Stainless Steel Gas Tube, Low-Profile Gas Block Machined from 4140 Steel |
| Muzzle Device | Standard 1/2-28 A2 Flash Hider with Crush Washer |
| Handguard Rail | 12" Slim Free-Float M-LOK Handguard, Machined from 6061-T6 Aluminum with Top Picatinny Rail |
| Bolt Carrier Group | 223/5.56 Caliber, Full Auto M16 Profile, 8620 Carrier, 9310 Bolt, Nitride Treated, Properly Staked Gas Key, MPI Tested |
| Charging Handle | Standard Mil-Spec AR-15 Charging Handle |
| Lower Parts Kit & Trigger | Exclusive PRO2A 3.5lb Crisp Pull Single-Stage Fire Control Group with Polished Trigger & Hammer, Standard Grip & Complete Mil-Spec Lower Parts |
| Stock Assembly | Upgraded PRO2A SOPMOD Stock, 6-Position Carbine Buffer Tube, Standard 3oz Buffer, Buffer Spring, Latch Plate and Castle Nut |
| Magazine | (1) PMAG or Similar Compatible Magazine |
| Manufacturing Origin | 100% Made in the USA with Pro2A Tactical Lifetime Factory Warranty |
The P2A HERO 12.5" 5.56 NATO 1/7 Mid Length Melonite M-LOK Rifle (SBR) elevates the short-barreled rifle platform with premium billet construction and refined ergonomics that address the limitations of standard forged-receiver builds. The upgraded 7075-T6 billet upper and lower receivers deliver greater rigidity and durability for sustained use, while the flared magwell and integrated trigger guard enable faster, more positive reloads—especially under stress or while wearing gloves. Combined with the exclusive PRO2A 3.5lb curved trigger and SOPMOD stock, the HERO series provides a noticeably improved shooting experience without sacrificing the proven reliability of the AR-15 platform.
The 12.5-inch barrel length strikes an excellent balance between compact handling and ballistic performance. It achieves better powder burn and higher velocity than shorter 10.5- or 11.5-inch configurations while remaining highly maneuverable for home defense, vehicle use, or close-quarters applications. The 1:7 twist rate ensures reliable stabilization across a broad range of ammunition, from lightweight training rounds to heavier 77gr match or defensive loads. The carbine-length gas system is carefully tuned for smooth, consistent cycling in this length, reducing wear and supporting reliable operation even under adverse conditions.
Introducing our "Hero" series line of rifles and pistols. With feedback from professionals and customers, the Hero line improves upon the Patriot line with additional features that enhances shootability . Our rilfe caliber Hero line replaces the standard forged receivers with a premium set of Billet Aluminum receivers - made from quality 7075-T6 billet aluminum, the upper receiver is beefed up to enhance durability and ruggedness. The lower receiver has a flared magwell and enhanced trigger guard that will allow for faster magazine changes and makes shooting with gloves easier. Our HERO SBRs also comes standard with our exclusive Pro2A 3.5lb Milspec Curved Trigger and also comes standard with the popular SOPMOD stock. And just like our patriot line, every Hero firearm goes through a stringent series of checks/tests and is meticulously put together to ensure a high quality weapon is produced. The Hero line is suitable for all kinds of scenarios and has the reliability and performance you come to expect from Pro2A Tactical. Because sometimes all you need is a Hero.
| SKU | P2AHR-556ACT12MID125-1.7-KM-SBR |
|---|---|
| Model | HERO |
| Barrel Length | 12.5 inch |
| Rifle Caliber | 5.56 NATO |
| Manufacturer | Pro2A Tactical |
