Build a Paintball Mine

Step 6 Plunger

Cut a 4” piece of the ½” PVC. Cut 5/8” off from one end of the ½” union. Glue the 5/8” piece of the union on to the 4” piece of PVC, so that about ¼” of it sticks out past the end of the pipe. (in the photo I only have about 1/8” sticking out since I cut the union a little too small) This small piece is what cups the top of the CO2 cartridge.