Hi everyone. I thought I would post up a tutorial on how to remove the orange plugs from the MR Jango Fett blasters. I hope this helps. If you need more information feel free to let me know.
Here is the blaster.
First remove the set screw under the barrel. You will need a very small alan/hex wrench. Remove the set screw completely.
Once you have the set screw removed remove the barrel tip by grabbing it and unscrewing it. You will actually be unscrewing the brass insert that is inside the tip from a brass tube that runs the length of the barrel, but using the tip of the barrel will let you get a better hold on it.
Once you have the barrel tip unscrewed and along with it the brass insert you can push the orange plug out from the back side with the wrench or something else similar. The orange plug has a rubber o ring around it that holds it in place. You can leave it out completely or flip it over to the machined metal side and reinsert it.