RE: Fun mostly.
Well, the next question liberals will ask would be this — Do you really need an AR-15 to have fun?
Yes.
Do they need: starbucks, fag tv, dope, iPads, frisbees, booze, tobacco, fast foreign cars, fag clothes made in Cambodia, trips on those evil polluting aircraft to foreign countries... ad naseum?
Fun is in the eye of the entertained. I love putting rounds into old washing machines and stuff.