There was provision for underwing racks for light practice bombs or rockets and a machine gun in a pod below the port wing.

During the evaluation of the military prototype, now designated P-3.02 (HB-HOO, becoming A-801 in January 1956), the aircraft had to perform against a T-34 Mentor that had been brought to Switzerland.

[3] The test pilot at the demonstration flight went to the limits and flew a standing "8", knowing, the Mentor would not be able to fly this manoeuvre.

[4] After the acceptance by the Swiss Air Force, the service received a pre-series of 12 aircraft type P-3.03 (A-802-A-813).

Six additional examples were built and flew with civilian markings, those P-3.04 were later acquired by the Brazilian Navy.