It is kinda loud. It is great in the short and long of it. Occasional breaks are simply shot out of the way. Barrel is easy to clean and deadly accurate. Nice looking too, but that comes second.
Noise is less than stock.
Barrell is slighty heavy but balances the marker nicely. Old Fart Dye DYE is made for hyperball. Nick I dont agree, not only is the dye more accurate, it has just as long if not longer range than a smart parts barrel. It'll work fine with Marballizer. Mine is a little temperamental with Premium Gold, but likes Marballizer just fine.