Sniper tips
NEVER stop moving! You will be less likely to get hit that way.
Charge up your shot (hold down the primary fire). It dispenses much more damage per shot. A fully charged shot to the head can even kill a HWGuy.
Missing a few sniper shots? Enemy closing in on your position? Take out the automatic rifle and spray the sucka. Each bullet hits instantaneously and it fires fast, which makes it very good when you can't seem to hit someone, even at long distances.
Take cover whenever possible.
Watch out for grenades! Zooming in reduces your view drastically. One missed grenade could land you in the next bucket of KFC :)
When you see a red dot, jump! You will most likely survive a shot to the leg then a shot to the head. Be fast or you'll end up on the ground.
If ur gonna be a sniper over all you just need to learn WTF ur doing before trying to "own" everyone i understand that not every sniper is the shit when they start but don't talk shit and think ur a bad ass till you get good!