Nothing! I have a Piranha, Black Dragun, and a bunch of other markers and I have played with Tippmann 98, Spyder, and others.
ICD Thunder Cat (original model), 14" Smart Parts Progressive
if any, it would be a longer barrel.
It is like a rock, I have played with it weekly for over 5 years
Indian Creek does not seem to be developing this marker !?!?!
This is the greatest line of markers I have ever seen. I have had mine for years now I keep buying new markers but I always go back to my Thunder Cat by the end of the day. I have a friend who had an Alley Cat (almost Identical), and it was unreal, I loved mine so much I bought my wife one. Its simple bolt system is far superior to these stacked systems. I replace my main spring yearly and some of the o-rings and I have never had a problem with this marker.
This is the greatest marker ever.
Buy one if you can find a new one, it will last you for a long long time!