Took the gun in to the shop here is the conclusion thus far:
the gears were not shimmed right, so everything got ***ked gears and the piston, since They didn't have a proper piston ----CA25 piston is larger than a normal piston--- he shimmed up the new set of gears really good and kept the old piston in till later this week when he gets in a new piston for it, picked the gun up Satuday and got some shots off then Im almost positive the piston totaly broke (think the teeth are all gone now) the gun didn't have nearly the power after going to the shop that it did before -- hopefully due to the piston being eaten up-- anyhow there gonna take care of the piston issue for me this week, (While in the shop though I did have them put in a 650mm MadBull Black Python 6.03 Tight bore barrel), so after this piston issue is solved hopefully accuracy and FPS will be looking better than it did origanally, also added a bipod and red/green dot scope (probley going to transfer the red/gree dot to one of my M4's soon though and put something better on the CA25) and I put a differant silencer on the end of it to better hide the extended inner barrel. pics to come tonight after work, as for the systema piston and plastic piston head that doesn't sound like something I'd want to put in this gun. Hopefully they will put in a quality piston if not I'll have to change in out with that promethius hard piston later, or possible the "super core piston"----Thanks for the tip Jack Of Hearts----