[CJay]

alot of info in the thread here - first off I'm just gonna say that if a piston goes that quickly even a cheap one its pretty much a sure sign that something else is going on - from the sounds of it the 140 spring is to blame and I'm not surprised really. like the guys said - use a 120 and u shud be good and not have the same probs.

As for piston choice I'd go for a modify 9 times out of 10 because I've had nothing but good luck with them. just another quick side note - metal or plastic teeth - virtually no difference unless ur gonna be grinding away in full auto continually. one thing i will say is that the plastic teeth are more likely to cause less damage when and if they blow out like that. now saying that I know the risks and custom build guns all the time and like i said I'm partial to metal - always use the modify titanium tooth and rack bed super hard piston. I've been using this one in my 470 FPS dmr for 2 years now and openin it up to check it now and again it's still in amazing condition and thats with using a 35C lipo on it so moral of the story is - if u use the parts right then u'll be fine reguardless. plastic will suit ur needs absolutly fine but only if u buy a lower powered spring to accomodate it. like somebody above said - reguardless of how many metal parts u throw in or plastic parts - it's plain and simple a cheaply made toy that will break someday, somehow lol. welcome to the wonderful world of airsoft - u can check ur wallet in at the door with our staff :P