Product Description

Transform your standard rifle into a heavy-hitting big-bore thumper with the PRO2A 8.5" .458 SOCOM Melonite M-LOK AR-15 Upper Kit. Built for massive close-range kinetic impact, this complete upper receiver assembly is custom-engineered to handle the violent pressures of the .458 SOCOM cartridge seamlessly. Featuring a premium 4150 CMV steel barrel and an enlarged ejection port, it offers reliable cycling and exceptional stopping power in a highly maneuverable pistol or SBR configuration.

Key Features

• Big-Bore Optimization: Mil-Spec forged upper receiver modified with a custom-widened ejection port to ensure clean, reliable clearance of heavy .458 SOCOM brass without stovepiping.
• Premium Melonite Finish: The barrel is treated inside and out with a Nitride/Melonite finish, yielding superior wear resistance, corrosion protection, and an extended service life.
• Hand-Polished Geometry: Features custom, wide single-feed ramp geometry engineered specifically to eliminate common single-stack feeding drag associated with big-bore magazines.
• Modular M-LOK Handguard: A 7-inch ultra-lightweight, free-float M-LOK rail system provides ample real estate for flashlights, lasers, and tactical grips while keeping the barrel completely isolated for better accuracy.
• Ready to Run: Carefully hand-assembled right here in the USA by expert armorers and meticulously tested to ensure perfect headspacing and out-of-the-box performance.

Technical Specifications

Why Choose the PRO2A .458 SOCOM Upper?

When dealing with big-bore AR platforms, mass production shortcuts lead to reliability failures. The Pro2A Tactical .458 SOCOM Upper cuts no corners. From its hand-polished feed ramps that defeat feeding friction to its custom-widened ejection port, every element is precision-tuned to manage heavy-grain thumping rounds. Proudly made in the USA and backed by a comprehensive lifetime support warranty, it is the ultimate combination of compact portability and relentless stop-in-your-tracks performance.