.458 SOCOM Complete Assembled Upper – Right Hand



Upgrade Handguard (Optional)

Upgrade Muzzle Devise (Optional)

Charging Handle

Blacken Stainless Barrel

458 SOCOM Ejection Port Cover

Gas Block

Upgrade to Stainless


Skeletonized Receiver

Bolt Group

SKU: 458-CAU-RH Category:


Ready to fire on your lower receiver. Available in Black 4150 chromoly steel or 416 Stainless steel options.
Base model includes black 4150 chromoly barrel, black flash hider, black gas block, bolt/carrier, charging handle, with plastic GI hand guards.  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 MI-G3 M-Lok hand guard or a round aluminum free float tube. Also available with various muzzle attachments, BCM GunFighter ambi charging handle, engraved ejection port cover, etc.  Note: NiB bolts have black extractors and ejectors installed.

Uppers usually ship 3-5 business days after the order is received.  Allow 7 days for optional blackened stainless barrels and 14-16″ pinned brake barrels.

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

All Tromix uppers are test fired prior to shipping.