If you are working on your 13xx pumper or 22xx CO2 pistol, here are some facts to digest BEFORE YOU START:
It is recommended that your work area have good lighting, a cleared work surface and a towel or mat or tray to catch things. If cleanliness is next to Godliness, Hell must certainly be full of messy folks!
If you have an exploded view drawing, then have that handy for reference. If you don't have one, go here: https://support.crosman.com/hc/en-us/sections/200658070-Crosman-Air-Pistols , then find your gun, and finally print one of them out for yourself.
If you find yourself about to remove the three screws that hold the plastic grip frame cover on the right face of the frame, STOP! If you remove it, then the safety ball and spring will come out of nowhere and try to escape this Earthly dimension entirely. Just kidding (but just barely). To safely remove the ball and spring, simply remove the two screws that attach the grip frame to the main tube. One is at the rear of the gun and the other is just forward of the trigger shroud. When you remove the second of these, hold the frame and the tube together if you have it upside down until you can get the frame back right side up. Separate the two parts. Look at the top of the frame where the tube had been to see just above the safety a tiny square hole where the spring and the ball live their lives. Turn the frame upside down while holding it over something to catch the little boogers. Aside them for later use. Now go back to doing whatever you were about to do to that frame or its many components (sear, sear spring, trigger, curve washer, trigger and sear axles, safety).
When everything is back together on the frame (except the ball and spring), you may drop the ball first into the littl square hole, then the spring may follow. Some folks will put a tiny dab of grease or moly paste on top of the spring just to hold it in place so you can turn it upside down to re-assemble it to the main tube.
Hope this helps somebody!