I prefer the K2, I know it may seem semi-noobish [because you can buy it at trainee] - but, it's fast, accurate and it can be used in CQC as well as Medium-Range Sniping; although I do carry around the L9 and a couple of Gas Grenades.
I hate the one that only use sniper rifle, I mean da mn grow some nutz my friend. Come down from your perch and get your hands dirty. Must be lonely sitting in One freaking spot all day long. Not my idea of fun. i like to run around and get in the Mutha F k r face. Boo Yah Bi tch.