Airsoft question (Guns)?

I am looking for an accurate sniper rifle that uses 25 gram pellets with no scope and its gas powered. but i'd maybe like a dragonuv or something but i'd rather get info from someone that has the rifle. it has to be between the 100-200 range in dollars. im gonna put a 12x scope on it. ( its gotta have a long attachment rail at the top to) someone please give me a link