Been wanting an assault rifle for a while. Guess the AR-15 will do, but open to any other suggestions. Problem is, I don't know much about them. I don't want super high end, but don't want junk either. Looking for a very reliable gun I can go out and shoot a few hundred rounds with for fun. Might double duty as a home defense gun so reliability is priority. No bench rest or specific target shooting. Heard of Bushmaster, DPMS, etc.. but not sure what is best. Sig, S&W, or SA would be of interest perhaps. Any advice on sights or tactical lights would be appreciated as well. 5.56 is the standard or do these guns come in other offerings? Thanks for any comment. Wife says thanks for helping me spend my money.