Stock barrels on Tippmanns, Spyders and Rebels. The Progressive was on a Spyder Sport. Progressive = Much better then any of the stock barrels if that is saying anything.
I only used Core Paintballs in this barrel.
paint in the porting
This barrel was quite accurate on a Spyder Sport. It is really loud. I don't know if that is the gun or the barrel, but it was a loud setup. Another thing is there always seemed to be some paint in the barrel, and when you pulled the squeege though it would get in the porting, which was hard to clean out.
I thought the barrel worked well. On the spyder threads the "Progressive" and "Smart Parts" was upside down which looked sorta strange. This barrel worked very well though.