First, don’t play with a bolt action airsoft rifle your first time out. You’ll feel undergunned when everyone else is using an AEG. Try airsoft out a few times before you rush out to buy that BAR. While using an AEG try it in semi auto and get a feel for giving your shots some delay. Does this appeal to you?
Third, forget most of the stuff you think you know about real steal sniping, most of it doesn’t apply to airsoft. You won’t be making 300 foot kills every pull of the trigger. You are shooting a round ball through a smooth barrel. The physics are working against it flying straight each time.
What you do get by using a bolt action gun are three things: quietness, more power generally(most fields let you use higher fps on bolt action guns), and patience to place a better shot because you’re not going to get another for a second or two.
Next, learn some field craft(sneaking, stalking, ambushing). There is too much in that statement to go over here, so I’ll just give you a wikipedia link. Ghillie suits are a part of this. While not needed, they really do help, especially in the close ranges that you must fire at in airsoft.
Airsoft sniping is generally a slow game that requires lots of patience to get the one good kill. You won’t be taking out a whole team most days. Sometimes you might not even shoot. The primary roll of a sniper is to recon. Your radio is your best weapon. Calling in enemy activity instead of killing the enemy is usually a better bet.
Don’t forget, there is a difference between sniping and being a squad designated marksman(DMR). A sniper generally works alone or with one other person call a spotter. A DMR will work within a squad with a bolt action or semi auto gun to take precision shots at enemy positions.
In conclusion, being a sniper in airsoft is very rewarding when you do accomplish your goals, but a lot of the time you will be slowly moving not taking any shots all day. Don’t go in expecting something that it is not.
On a side note, sniper rifles are great items to upgrade, but they get expensive quickly. The average cost of most upgraded sniper rifles is in the $500 to $600 range. So don’t expect that a $130 gun is the end to your money spending while being a sniper.