Hello this is my first post here! Anyways, I'm pretty much a newbie when it comes to full auto firearms. but from what Ive read, the glock 18 would empty a 33 round magazine in less than two seconds... Isn't this a little too fast to be used effectively to defend yourself against multiple opponents? That would mean that you must let go of the trigger many times while emtying the magazine to make the time to empty it longer, and that sort of defeats one capability of the full auto which is to "spray." Is this correct? And how does this compare to other submachine guns such as the uzi or the ingram? Thanks.