Any quality barrel kit with different bore sizes. I use a Pepper Stickz kit.
Breaks on impact, not in gun
Breaks EVERY time
I just used this stuff last weekend for the first time, and i gotta say that this is easily one of the best types of paint i have EVER used. I shot literally all day...2 cases, and i didn't have a SINGLE break in the chamber or barrel. Every person i shot got pulled immediately b/c the ball broke and marked clearly. Also, for 45 bucks a case? I mean, cmon, you can't beat that for quality paint. Why, just last year i was paying as much as 70-80 bucks a case for paint that didn't shoot as well. I simply loved this stuff and i would recommend it for anyone who is looking for high quality paint at a reasonable price. I evern looked for weaknesses and i really couldn't find much of anything, honestly, this stuff is amazing.
Next time you see this at your local field, pick it up and try a case, i promise you won't be disappointed. And if you're playing out in the woods, pick up a case off actionvillage, you'll pay less than you will for cheap wal-mart paint, and it shoots infinitely better.