Could Someone suggest A good Paintball Sniper Rifle that can be easily modified?

Everyone pretty much nailed it. Tippmann model 98 or a5 is going to be your best bet. Opsgear.com has some milsim kits for these markers that are really nifty and look just like real machine guns/sniper rifles. Just remember when choosing a barrel for your set up that any barrel over 14" becomes a friction problem and destroys any markers air effeciency and accuracy drastically. Stick around a 12-14" barrel (j&j ceramic,evil driver,armson stealth,smart parts tear drop,ect.) these barrels might not carry the "sniper" look but they'll be the closest to actual performance and in the "bush" that's all that really matters. Pbreview.com has reviews over many markers,tanks,barrels,mask,ect that will help you in the future when making gear decisions.

Several of the Spyder Mechanical Models can be modified to fit into an airsoft sniper body. There are literally hundreds of them out there, but here is a good place to look for some help: http://www.pbnation.com/forumdisplay.php?f=231 http://www.pbnation.com/forumdisplay.php?f=145 As said, there is no "sniper rifle" per say, but there are many that look and look about the same in that sense. Good luck! -Alex

tippman a5 is the closest to a sniper rifle, and u might want to invest in a flatline barrel