My son absolutely loves to play with toy guns, he's usually good about pointing them at the wall or couch (anything but people)....but he enjoys them soooo much, it worries me. If we go toy shopping, a gun is all he wants (he will choose it over anything). Would like some opinions about this or personal experiences.

I want to make a short action film but one problem i dont know where i can get toy machine guns or sub machine guns. I have looked on usa online shops for toy guns but they don't ship to Australia. I've tried ebay Australia they only have water guns. Please help me?