LITHGOW "OWEN" submachinegun
LITHGOW "OWEN" submachinegun. It has a VERTICAL catch for 20-rounds .9x19mm-Parabellum magazine. It was the standard SMG for the australian army until the adoption of the STEYR AUG weapons system (license made by ADI Limited), when the standard SMG for their army became the AUG-Para (a.k.a. AUG-9mm, license-made in Australia as the ADI F96).
Photo and information from: PIERANGELO TENDAS