The vortex cap I used for this was one I made just to try out the whole vortex cap thing to see if I could make one. After letting it sit around for awhile, I decided to give it a new barrel and a wood stock.
It shoots reasonably well, the hopup unit at the end does help some, but it causes some occasional fliers that are way out of the normal spread.
I have a bigger mag for it, consisting of a 90 fitting and a longer pipe, but I couldn't find it for the pics.
The rail was just for kicks.
Thanks to the internet, I know everything about everything exept how to actually do anything.