I built an AR for my for son for Christmas, now i would like to get him a scope and mount for it. I'm thinking up to 9 power, will probably shoot out to 100 yds but would like the ability to reach a little farther. He will be 15 in June and I would like to keep it under $200 with a mount. I currently have a 30mm mount that would work but don't want to limit it to only something in 30mm. So tell me what has worked for you and offer up any suggestions you have looked at. Thanks !