I have an AR-15 with a target barrel I want to begins some long range shooting with and was wondering what suggestions does everyone have for a good low budget scope? I'm wanting to do shooting up to around 600 yards. I would like to get a mil dot scope and need it to be good but not expensive. The cheaper the better. I'm not doing any competitions I just want to begin to get into the sport and stretch its legs. I have already done some searching in the forum just looking for personal opinions on what others would do.