For URF-F (Upper Receiver, FCD, Forged), there is but a single functional change we wanted which differs from the TDP spec forged upper receiver. Specifically, URF-F has relief cuts/chamfers on the area above the charging handle (before 1913 rails start) for better accessibility of a flip up BUIS's sight stalk / flip up element. In 2023, we also added another bevel in the rear. URF-F is based on TDP spec forged upper receiver, it's made and modified for Forward Controls. Type 3 hard coated in black. Like TDP spec A3 upper receivers, URF-F can accommodate a forward assist, but does not come installed with one.

NOTE: there is an overlap of the Centurion Arms made URF-F and 2023 late summer version. The major difference is the presence of anti-rotation pin hole for the latest URF-F for HDSI, SOLGW and ZEV handguards. Centurion Arms made URF-F uppers do not have the pin hole.