Choice of Bore Sizes
Nothing. Some of my friends shoot with this barrel and like it. They shoot with Tippmans, Cockers, Mags, and Spyders. So far none of them have complained.
I like this barrel a lot. I bought it because I didn't like the way my All American barrel looked on my Spyder. I went in search of a Dye barrel, but fell in love with this one when I shot it. It easily fits the budget of a player looking for a good barrel at an affordable price. Buy it.