Marbalizers, not diablo blaze its too small, any medium paint
the rifiling is the key factor in the accuracy
a little hard to clean
this barrel is the best ive seen in my whole life as a paintballer it is the best upgrade that can be done to a spyder it is extremely silent and accurate at close and far distances. well i gotta talk some more cuz i have to little bit amount of words so let me also add that never to get a barrel by 32 degrees or smart parts except its a freak or all american(kinda good) armson better.
Get the armson for any gun you have it is totally worth it. dont get any other barrel this is the best one.except if you have money for a freak system but the freak isnt as silent as the armson.