Description
For the URF-F (Upper Receiver, FCD, Forged), there is but a single functional change 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, FCD also added another bevel in the rear.
