.458 SOCOM 8″ Micro Complete Assembled Upper – Right Handed



Ejection Port Cover

Upgrade Handguard (Optional)

Gas Block

Upgrade Muzzle Device (Optional)


Barrel Finish

SKU: 458-MCRO-CAU-RH Category:


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

Ready to fire on your lower receiver.  Barrels available in stainless or chromoly with standard 1:14 twist.  Fast 1:10 twist available in stainless only.
Base model includes 8″ black barrel, 1:14 twist, muzzle threaded 5/8-24, black flash hider, black gas block, bolt/carrier, charging handle, with 7.25″ old-school round free float tube hand guard.

Upgrade your SCM18-Micro with the Midwest Industries CRM M-Lok hand guard.

All Tromix uppers are test fired prior to shipping.