-Good for an aftermarket barrel
-Hard to clean porting if you break
-New version flares out = ugly
The Progressive comes stock on the Impulse and it works fine with me. I used some Draxxus Dusks with it and it wasn't to accurate because Dusks are small bore'd. Use some medium-large bore paint and this barrel should work fine for you. The 2003 Progressives flare out at the end and it's ugly. It's also hard to clean paint out of the porting if you break. (Wasn't the barrel's fault, I actually shot into my condom.) :?
Good aftermarket barrel if you are on a low budget.