thanks redlig..

lord Odin, i have this one.
Paintball Tippmann A-5 A5 Aluminum Power Tube & Bolt - eBay (item 260265355396 end time Dec-17-08 18:42:04 PST)

the only reason i bought it was because the last time i went playing, i let my nephew use my gun. He said time out in the middle of the 2v1 game and said the gun stopped working. I find out that there was dirt in the hopper and he was firing dirt covered balls for a bit before it statred chopping. my guess is he probably fell, dropped the balls, and picked them back up without thinking they were no good anymore. anywho. my stock front bolt was raped by the dirt, so i figured i should just get a new set.