The armored MOWAG 3M1 Pirat was a prototype for an armored personnel carrier developed by the Swiss company Mowag.

Initiated by the development project of the future German Marder infantry fighting vehicle, which was evaluated and tested in the various test series, Mowag developed the 3M1 Model 1 - 6 infantry fighting vehicle in 1966, which was based on the Mowag Pirat 18.

However, the development resulted in the Mowag gun carriage, 2000 of which were manufactured in Kreuzlingen for the Marder series, and the ball screens (gas-tight spherical firing flaps) used on the Marder, 8000 of which were supplied.

A special feature was the arrangement of the drive unit in the engine compartment, which was located in the center of the vehicle.

Another innovation was the complete production of all drive components such as the engine, transmission, side-feed and cooling system at Mowag.