This is an A&K Dragonuv, which I have modified with the AirsoftPro CZ spring, cylinder & hop up system - as well as replaced the barrel with a MadBull tightbore. I haven't skirmished in a couple years no, so I would suggest chronographing and testing the seals - but it worked the last time it was tested and was about 450. I've included the five additional springs I got whilst fine tuning the FPS originally, as well as 3 low capacity magazines.   It has a side mounted