Spyder SE with DYE Stickys, Superfly bolt, clear 12-volt revolution, and I switch between my zero grav and my system-x two peice barrels.
Very accurate, hardly ever breaks paint, and looks cool. It is very quiet and I have never had any problems with it in the year that I have had it. Very tough and it always shoots very consistently. A couple of my friends have them and they have not had any problems either. It also looks good with just about any gun.
very, very small bore size. Other than that nothing.
Excellent barrel. I would recommend it to anyone looking for a new barrel. It also has a good price for the quality of the barrel. I don't recommend this to newbies because of the price it is a big commitment.