The U304(f) half-track transporter, was widely used by the Germans for auxiliary and transport tasks and as a platform for various weapon systems. One of them was in antiaircraft role, mounting a 2cm Flak 38.

Several design changes were introduced in the late version of the vehicle:

• Modernized superstructure: the sides were higher and had a simpler, more angular shape, which improved crew protection and structural rigidity.
• Improved platform for the gun: the mounting of the Flak 38 was more stable, which increased accuracy when firing while moving or from a short stop.
• Modified side shields: folding or removable panels were often used, which made it easier for the gun crew to operate at different angles.
• Improved crew ergonomics: more space for the gun crew and ammunition, which improved combat effectiveness