.458 SOCOM Complete Assembled Upper – Left Handed



Upgrade Handguard (Optional)

Gas Block

Upgrade Muzzle Devise (Optional)

Blacken Stainless Barrel


Left hand ejecting complete upper receiver assembly.
Ready to fire on your lower receiver. Available in Black or Stainless barrel options.
Base model includes black barrel, black flash hider, black gas block, bolt/carrier, charging handle, with plastic GI hand guards .

Upgrade your SCM18 with the Midwest Industries CRM M-Lok hand guard or a round aluminum free float tube.

Pic shown with 16″ mid-weight black barrel, with MI-CRM 12.6″ M-Lok hand guard option. (+$165)

All Tromix uppers are test fired prior to shipping.