PorkBroth

So I'm completely new to airsoft and I have a few questions about it. Should I just leave empty mags on the floor and move on or take it with me? Is any gun allowed to be bought to any game or are there restrictions? How are attachments added? e.g. Sights, Barrel, laser, et cetera. Where are the best places to play? (preferably in the south) What are the rules on firing mode? (Automatic and Semi)