Safety spring for receiver, new, two included in short length. I cut these short length springs and they range from .25-.3 inches
Since I cut them the ends are not flattened but they are significanty cheaper than the other springs I've come across.
Some paintguns require the longer spring and some need the shorter spring (this listing is for the shorter spring).
Off the top of my head, the shorter spring works well:
in carbon fiber Automag frames with the set screw for the safety ball and spring
later sheridan frames with the set screw
some cocker frames with the set screw for the safety
