CrossFire Sniping Tip:
If you have a sniper, and you play in Monaco, play on the Global Risk side. Then go up the steps in your base and get your sniper, if you are on the right sniping area, (right side), you should see a flag, if you see an enemy under the flag but in their base ready to snipe, just snipe the flag, it goes straight through it and snipes the enemy.

NOTE: AWM is best for it, it has more power.

Hope it helps.