PRO2A 8.5" 458 Socom 1/14 Pistol Length Melonite M-LOK AR-15 Upper
By Pro2A Tactical | Made in the USA
Compact Big-Bore Power & Devastating Performance
The Pro2A Tactical 8.5" .458 SOCOM Upper Receiver delivers massive stopping power in a highly compact, maneuverable format. Purpose-built for AR-15 pistol or registered short-barreled rifle platforms, this configuration features a premium 8.5-inch 4150 Chrome Moly Vanadium barrel with a 1/14 twist rate optimized for heavy-grain projectile stability. The entire barrel undergoes an advanced Melonite (QPQ Nitride) treatment to achieve unmatched surface hardness, exceptional corrosion resistance, and a simplified cleaning process.
Engineered around a reliable pistol-length gas system, this upper is meticulously tuned to ensure consistent cycling and proper dwell time with hard-hitting big-bore rounds. Enclosed in a slim-profile, free-float M-LOK handguard, it offers plenty of modular space for lights, lasers, and accessories while eliminating handguard contact with the barrel to enhance optimal harmonics.
Technical Specifications
- Caliber: .458 SOCOM
- Barrel Length: 8.5 Inches
- Twist Rate: 1/14 Twist
- Gas System Length: Pistol Length
- Barrel Finish: Melonite / Nitride
- Barrel Profile: Medium
- Barrel Material: 4150 CMV Premium Steel
- Muzzle Thread: 5/8x24 TPI
- Muzzle Device: Standard A2 Flash Hider
- Gas Block: Low Profile Gas Block
- Upper Receiver: Mil-Spec 7075-T6 Forged Aluminum with Forward Assist & Dust Cover
- Color: Hard Coat Anodized Black
- Handguard: 7 inch Free Float M-LOK Rail System
Key Product Features
- Big-Bore Straight-Wall Lineup: Engineered specifically to feed and extract the wide, high-impact .458 SOCOM cartridge reliably from standard AR-15 platform designs.
- Premium Surface Hardening: Severe duty Melonite finish treats the bore and the exterior, increasing resistance to abrasive wear.
- Versatile Layout Options: Built standard with a traditional mil-spec charging handle, with easy customization pathways to premium ambidextrous options or options to enhance usability.
- Free-Float Ergonomics: Continuous top Picatinny rail aligns flawlessly with your lower receiver to support red dots, iron sights, or thermal optics sets.
Lifetime Warranty Included
All Pro2A Tactical assemblies are meticulously built by certified armorers and backed by a comprehensive lifetime warranty against manufacturer defects, ensuring severe-duty field performance.
