Hi. Please note that I'm not a beginner. This will be my 4th gun. I just want to look into airsoft sniping and I don't know what gun to get. People say the jg bar 10 but I don't really know why are they good? What makes a sniper rifle good? What upgrades can I do to a sniper rifle? I know upgrades cost quite a lot but first I want to look into the base gun. What is the best under 200usd?