.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 June 2023, 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 6061 M4 style upper receiver, 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 or heavy duty Tromix 7075 billet receiver.  Other options also available.

All Tromix uppers are test fired prior to shipping.