cp drop forwards
smart parts dovetail asa
faster rate of fire
The Firebolt is an awesome upgrade for a little $$$$, it will up your shots per tank by almost doubling it, my ion shoots faster because its lighter, i broke one ball out of 2000 shots that covered the eyes. the gun is much quieter which is great for any course when people don't know where you are shooting from. also another barrel ported better and longer will jack up your accuracy and make it even quieter. make sure when you are installing it you use a lot of grease while installing to prevent leaks and less ware and tear (watch wear your stock bolt is greased and copy it) then re-grease after shooting about 500 balls through your gun.
Overall very recommended cheap upgrade plus if you have an upgraded board your stock bolt being heavier it will begin tearing up o-rings and metal shavings will wear off this new bolt will help that.