This is my Spyder SE. Right now I have a J&J 16 inch barrel and a Delrin bolt. My latest upgrade is a turbo performance valve, which was fairly easy to install. Out of the box it was fast, but now it's even faster. I don't really know what else there is to put into it except for an electronic frame, but that would be a waste of money. But I will continue to update it with more new parts as I find the time, and most of all, money.