Only the crapy WalMart Brass Eagle stuff, and don't buy Brass Eagle.
Custom 98, Model 98, no upgrades.....yet
Any barrel should be fine. The paintballs are great.
Shell is just right. I've only used the green shell white fill, but it works charms. I have minimal ball breakage, and if they ever break thats because my stock barrel isn't good. The first time I played with these I played for eight hours with no breakage. I love these balls.
Uhh............1 out of 100 break? Maybee
Great balls, I would recommend them to any player who enjoys playing paintball for a long period of time.