Need Advice On Purchasing An Airsoft Rifle. Any Airsoft Players/Airsoft Sniper's Advice Is Appreciated.?

Out of those 3, I would suggest the Spring L96. I would also suggest NOT ordering from Airsplat, unless you want your items to arrive broken, damaged, or for them to get your order wrong. I wouldn't suggest starting airsoft as a sniper, but if you want to, that's your choice. As for Airsoft BBs, DON'T use Crosman brand. Also, don't use anything lighter than .25g bbs in your rifle. Also, look out for 8mm bbs, which won't work in your gun. 8mms are generally rare, but there is a chance you'll stumble across some. The Gas gun will require a great deal of maintenance. If you don't like maintenance, I would again recommend not being a sniper.