.458 SOCOM Complete Assembled Upper – Right Hand



Upgrade Handguard (Optional) * 

Upgrade Muzzle Devise (Optional)

Blacken Stainless Barrel

Must order STAINLESS barrel above, for this upgrade.

458 SOCOM Ejection Port Cover


Gas Block

SKU: 458-CAU-RH Category:


As of May 2022, allow 5-10 days for this item to be built and shipped.

Ready to fire on your lower receiver. Available in Black 4150 chromoly steel or 416 Stainless steel options.
Base model includes a black 4150 chromoly barrel, black flash hider, black gas block, bolt/carrier, and charging handle.  You must select a hand guard option or have no hand guard installed in order to purchase this item.  All barrels are threaded 5/8-24 except for the 16″ unthreaded model.  Standard twist is 1:14.  Fast 1:10 twist also available in 8″ and 10.5″ stainless steel only.  Large subsonic bullets stabilize fine with 1:14 twist in 12″ and longer barrels.

Upgrade your upper with the Midwest Industries CRM M-Lok hand guard or a round aluminum free float tube. Also available with various muzzle attachments, engraved ejection port cover, etc.

Black chromoly barrels and Blackened Stainless barrels are externally coated with 2400 Series Bake-On GunKote.

The 14-16 with pin/welded brake is ONLY available with the already installed 4-port light weight brake.  No other brake can be substituted.  DO NOT select an optional brake if you have selected the 14-16 barrel.

All Tromix uppers are test fired prior to shipping.