They shoot like a four inch barrel (because basically that's the only part of the barrel that is effective). Very crappy. They have a sort of following as a weird barrel that wasn't sold for very long (and never got popular). They only person I ever knew that used one continuously swore by it....he had a huge problem with barrel breaks before he got it.
It is a nice oddity...it will get a lot of weird looks at the field, and will be LOUD, so try it out and if it works for you enjoy it.