You could create a pin to put into the plunger of the popper, and dremel out the part that holds it, so as to make the catch very unstable and any jarring motion would cause it to go off. I don't know if it's possable, but that's my two-cents.
Alright guys. I have not done any reinforcements, I only have the stock spring in, and the breech handle is at least an inch away. I have taken out the internals and put them back in around five times, and I still can't figure out the problem. I will post pictures later today or tomorrow.