A pipe nipple breech plug, no safety glasses, this is quite dangerous. As mentioned, with all the slack in the fit of the barrel into the breech section, probably a lot of pressure is lost. Plumbing fittings belong under the sink, not in firearms. He has been lucky so far. I had a 12 bore burst 10 inches from the breech when I was shooting it and I don't wish that on anyone. The kid is lucky that he got no barrel burst from shooting out the obstruction in the bore and I am curious if there is any bulging. This kid is an accident waiting to happen.
