I put this in another post but did not get any response. I guess everybody had already left that thread. Just got a new M&P 15. I am a hand gun guy and know very little about long guns. I am looking for advice on what kind of sights I should put on the new gun.(Please don't ask for pictures because I just don't know how to do that.) This will be mostly a fun gun but may see some use for home defense. Should I use iron sights, or red dot, or some kind of scope? I know you guys will give me a lot of good choices.