I happened to come across one of these (http://www.evike.com/product_info.php?products_id=30161) awhile back for pretty much free (got it plus a WE Hi-Cappa 5.1 Dragon for $60 total, later sold the Hi-Cappa for $60). Now I'm trying to figure out what I need to do in order to raise the bar on it. It's an "ok" gun as is, but internally I'm sure there are a few things that can be done to increase not only the ROF but also keep it between 330-400 (the local CQB wants 350 and our outdoor field runs no more than 400) so either of those would be a good goal. Externally the first thing I noticed was that the rear stock sucks, very wobbly and when in it's retracted position it affects the fire selector (this could easily be fixed with a little dremel work. What are my options as far as getting a full stock fitting on it, or maybe even a crane stock w/buffer tube? So far my plans are to: Completely disassemble. Replace any parts that are broken/missing. Rewire entire gun with low resistance wireing, add MOSFET & Deans connectors. Reshim & regrease all gears. Add Sorbo pad and adjust AOE. *If piston teeth are stripped replace with SHS 7 metal teeth piston & Lonex POM piston head w/o-ring Replace spring with either a M110 or M120 (Systems, Guarder or Prometheus) Check air seal. Replace air nozzle if air seal is poor. Replace inner barrel with Madbull 6.03mm (455mm) barrel & either systema or prometheus (soft) bucking And either a Lonex, SHS or AMP torque motor. All help with this will be greatly appreciated. Thanks in advance.