Originally Posted by Dusti69
so then in that case it sounds like i should get this rather than the piston head itself
im assuming that theyre not gun specific
I... think that's right.. (can't really tell from the picture... The Oring looks a little small...)
but the back of stock marui heads have the string-grabber thingy... Buy that, take the head off, and take the spring to the hardware store and get yourself some thread locker and a proper sized nut to fit on the bolt.
Really, you should just take the time and upgrade your piston head... everything you'll have to do is about the same amount of work.. and upgrading the piston head will give you the best result.