.458 SOCOM AR-15 Upper Assemblies

Upper Assemblies

Shop .458 SOCOM AR-15 uppers from Moriarti in multiple barrel lengths, handguard styles and finishes. Designed around the AR-15 platform, .458 SOCOM provides a large-bore option for shooters seeking heavy-projectile performance from an AR configuration. Browse compact and rifle-length .458 SOCOM upper assemblies and compare barrel length, twist rate, muzzle device, rail system and included components to select the right upper for your setup.

Can a .458 SOCOM upper fit a standard AR-15 lower receiver?

A .458 SOCOM upper can be configured around a standard AR-15-pattern lower, but the complete setup must use caliber-compatible components. Buyers should verify the upper's bolt or BCG, magazine compatibility, buffer setup and other manufacturer-specified requirements for the particular configuration.