The mechanic for sniping in Modern Combat 2: Black Pegasus is really easy for some reason. Even if you're not a good sniper in some of the later Modern Combat games, you'll easily be able to snipe on Black Pegasus and get some pretty nice kills. Just be sure to run +20% Snipers Damage on the M40A3, as otherwise it's trash. Before you unlock it, run the Dradonitch and always try to aim for the head.
Sniping in Modern Combat 2 is really easy. And all my teammates were using assault rifles and the shitty and nooby Dradonitch.