It works, a little too well. The range you get is unbelieveable, and it does travel in a straight line. It also lines up with my aftermarket sight (on the y axis), making manual accuracy better.
Has to be lined up perfectly, and requires allen wrenches to install. Also not very reliable- needs marballizer paint or nothing, and doesn't like inclemant weather.
Well folks, it works, and it works great. My friends were very angry at me for purchasing this barrel because I have acquired the ability to cap my friends from accross the field (goggled my friend the first time I played with it- he told me he didn't even see where it came from). I would have a backup barrel (lapco or dye) for when it acts up, though.