In re: "blastsmith", the term "plasmonger" came to mind for some reason, although strictly speaking that might be a different field of weapons? The idea comes to mind though of somehow taking a tap off a starship's plasma conduits and plugging that into a PPG. I imagine that immediately afterward someone would be having a Very Bad Day, although it would be debatable if the person in front or behind the PPG is going to be worse off.

"This is probably a stupid question, but . . ."