Nevada reviews are correct - Radical Firearms 16 in. 458 SOCOM Upper Assembly

Trouble with clambering multiple types/weights/brands ammo. Had to repeatedly mortar rounds out due to incomplete seating of the round. 5.57 style feed ramps are terrible. Had a round that failed to fully seat but still went bang. Damaged the barrel extension and bolt. Replaced bolt and cleaned up the feed ramp only to have it happen again. Ended up buying a new barrel, upper, and bolt to overcome the terrible quality of this product. I would have been better off buying a better product from the beginning.