I have also used the Flatline for the model 98, and the bOoYaH Ultra barrel was very similar. Stock barrels just don't compare.
Tippmann 98, 12V Revolution, 14" Progressive, 48ci/3000psi Pure Energy Tank
Since this is an average bore barrel, .689 I believe, just about any paint works well. I like to use Blaze, Infernos, and Dusk paint through it.
-Accurate with a good paint match
-Perfect Lengths for Super Airball
-Not 2 Piece
-Doesn't come in short lengths for different uses
I got this barrel from a friend for my Custom 98 for 15 bucks used, and it was worth every penny, even if it would have cost 35 new. The porting at the end of the barrel made it pretty quiet, especially compared to the normal cannon-like sound of the Tippmann 98. With my Sam's Club ancient paint, I experienced no chops with this barrel. The balls traveled very straight, and the gun was quieter.
With field paint, my results were the same. I had no chops, I was shooting more accurately, and my gun was quieter. The 14" length proved itself on the airball field. I was able to push in against the bunker, and get better shots against my opponents.
One of the most important tests that I put this barrel through was if it could shoot itself clean. I forced a break by out shooting my hopper, then I fired several paintballs through to see if the barrel would shoot itself clean. The results were impressive for a 30 dollar barrel. Most of the paint came out within 3-4 shots, and after 5, the gun was shooting perfectly accurate again.
While this barrel has its downsides, its upsides far outweigh what is bad. My rating of this barrel is a flat 9, and I would highly reccomend it to anyone looking for a quiet, .689 bore, accurate barrel for less than 50 dollars.
This is a great barrel. 9/10! It often goes on sales at many stores too, so see if you can get one cheap. If you have the money though, wait to get a 2 piece barrel.