Brass Eagle, and i didn't get to use them because my friend bought other paint and i let the bag sit in my garage forver so they all got morphed.
i wouldn't recommend using any barrel, cause they suck
the only good thing about them is that they have a bright color and you can see where they are going really well
every third shot would break and then the rest would break after that. then i'd have to clean my barrel and the inside of my gun. i get about 10 more good shots from like 50 and i wouldn't ever hit anybody. they weren't acurate either. even when there was absolutely no wind at all, they would still go in all different directions. i was with two other guys using them also. one had a tippman 98 custom and the other had the same gun as me. they both had the exact same problems with their's. they even had some other problems that i can't remember too.
if you absolutely have to buy these paint balls and you can't buy anything else at all, sell your gun and get a different hobby. i would even suggest , that for the pirros out there, buring down the factory where they are made.