Australian Invents World's Best Sub-Machine Gun -- The Owen gun, Invented by an Australian, and being Mass Produced in Australia from Australian materials has proved, under thorough tests, to be the best sub machine gun of the *****.Mud-Proof and sand-proof, the Owen Gun fires 30 rounds in 3 seconds with greater Velocity, deeper penetration and less recoil than other sub-machine guns. Ingenious but simple catches allow for ***** of Magazines and dismantling generally, in an Instacost is less than ***** weight 10 ¼ LBS. June 10, 1942.