Official German designation: Panzerjäger 38(t) mit 7,5 cm PaK 40/3 Ausf. M Main armament: 7,5 cm PaK 40/3 L/46 Chassis: Geschützwagen 38(t) Ausf. M Ordnance inventory designation: Sd.Kfz.138 Armoured Fighting Vehicle Type: tank destroyer