I actually didn't have much concerns for the black pipe.
It was pretty clear in his vids that he used a welded screw in a pipe cap and might assume that was welded to the pipe based on the last blow out (receiver Launch) in the second video. What was impressive was the plugged barrel actually broke the receiver away from the "Pipe Jaws" in the vise...but don't know if he re-tightened it after every shot. "Second Law"...no doubt.
Unfortunately it didn't dawn on me that your receiver nipple cap on your videos was what was molded into your PVC, until I watched it again and paused the end view. The firing pin looked to be a wood press fit plug with an 8-32 screwed through it and would likely disintegrate before braking the cap in a barrel plug situation...but that's only a guess.
Cheep n' cheerful but might prefer a 1911 or my Katana...in a pinch for safety. Thanks for sharing.
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