Engineered for optimized velocity and maximum long-range stopping power, the PRO2A 18" 458 Socom Upper Receiver Group comes completely assembled, headspaced, and test-fired to drop directly onto your standard mil-spec AR-15 lower receiver. Squeezing every ounce of ballistic potential out of the heavy-hitting .458 SOCOM cartridge, this configuration combines a longer 18-inch profile with a premium free-float M-LOK handguard and an integrated flash can. This ensures that unburnt powder, concussion, and heavy muzzle gases are propelled safely downrange, away from the operator.

Technical Product Specifications:

• Caliber: .458 SOCOM
• Barrel Length: 18 Inches
• Gas System: Carbine-Length (Direct Impingement, tuned for smooth extraction and extended dwell time with heavy projectiles)
• Barrel Twist Rate: 1:14 Twist (optimized for uniform stability across popular hunting and tactical bullet weights)
• Barrel Material & Finish: 4150 Chrome Moly Vanadium Steel treated with a premium Melonite / Nitride QPQ finish for ultimate corrosion and wear resistance
• Handguard: 15 Inch Free-Float M-LOK rail providing continuous top-rail estate and modular mounting points
• Muzzle Device: 5/8-24 TPI, Enlarged to 45 Cal, A2 Flash Hider and Crush Washer
• Receiver Material: Milspec Forged 7075-T6 aluminum upper receiver with a custom widened ejection port for clean big-bore brass extraction
• Platform Compatibility: Standard AR-15 mil-spec lower receivers
• Manufacturing: 100% Made in the USA

Key Product Features:

• Custom Widened Ejection Port: Specifically machined to facilitate the extraction of thick .458 SOCOM casings, completely eliminating stovepiping.
• Hand-Polished Geometry: Features carefully contoured feed ramps tailored to ensure flawless single-stack feeding of massive projectiles.
• Rigid Receiver Uniformity: Hand-assembled by professionals with meticulous headspace verification, receiver squaring, and strict gas block alignment.

Why Choose the Pro2A Tactical 18" 458 Socom Upper ?

Hand-Built for Total Reliability

Unlike massive assembly-line manufacturers that push out generic components, Pro2A Tactical takes the extra time required to build uppers right. We check receiver uniformity, lap receivers if necessary, verify an incredibly tight barrel-extension-to-receiver fitment for maximum accuracy, and meticulously double-check the gas port diameter so your big-bore firearm runs trouble-free from day one.

Melonite Protected Barrel for Hard-Hitting Longevity

The premium 4150 CMV barrel is shielded inside and out with a slick, ultra-hard Melonite (QPQ) finish. This advanced liquid-nitride treatment seals the pore structure of the steel, dramatically expanding service life, boosting shot-to-shot consistency, and providing premier resistance against humidity, rain, and corrosive element exposure.

Sourced From Premium Domestic Partners

We believe in total transparency. That is why we proudly disclose that we source our barrels, rugged handguards, and forged upper receivers from elite US manufacturers like Hitman Industries, Kak Industry, and Bowden Tactical. You always know exactly what quality components are backing your investment.

Lifetime Warranty and Support

Every Pro2A Tactical manufactured upper is backed by a comprehensive **Lifetime Warranty** against defects in materials or workmanship to the original purchaser, giving you complete peace of mind in the field or on the bench.