i have used no gun that is as horrible as this one.
Right now i have a chaos with a freak barrel.
I don't think that you can upgrade anything on this god awful peice of crap.
The only good thing about this gun is that you dont really need to clean it becasue if it breaks then WHO THE HELL CARES!
-it is to big to use as a sidearm, but that is what it is supposed to be.
-it breaks lots of balls, even though it fires slow as hell.
-it is to expensive for what your getting, even though it is cheap, i think it should be 10 dollars. i cant believe i wasted my money on it.
do not, i repeat, do NOT buy this gun. it is horrible and usless. I would rather throw paintballs at someone then use the jackal.