I have an M249 that has been upgraded with a wiring kit, AGI piston, silent piston and cylinder head kit, and it is wired to deans. Now it does have a couple problems. The carry handle broke and fell off, the stock pin went missing (replaced it with a bolt) and a piece that holds the front hand guard broke, so I have it taped on right now. Internally, the gun is perfect, externally, she could use some love.
I would like to get somewhere around $175 OBO so offer up!
Pictures are here:
http://s1106.photobucket.com/albums/h361/paintball958/I can meet up at Vanguard or Gearbox if you would like to see it in person