I have a JT excellerator 4.0 (cant wait for the 6.0) with a jt 2 piece barrel on it
I reccommend pmi premium paint or rps big ball paintballs
This barrel is very good its accurate, it has the benefits of both stainless steel and aluminum. The aluminum allows light weight and the stainless stell provides accuracy. To top it off its two piece so you can change barrel lenghts and so on
There is nothing i found to be bad about this product.
Overall i reccommend this barrel over a dye boomstick and its well worth the money i paid for it. I got mine for $75.00 on the internet. This barrel is almost the same as the boomstick but alot cheaper so go and buy it.