Step 1: Getting a gun
I trust all readers will follow safty guidelines set by the owners of your local field.
You can use any gun to snipe, some just work better than others.
-Pump guns, like the WGP Sniper, are more accurate than semi-autos, but are hard to find and can get pricey
-Semi's, like a Model 98, are usually fairly accurate, they are easier to find and often cheaper, but not as accurate.