[TheBackyardScientist] at it again with another super villain-esque demonstration of gadgetry: a liquid metal squirt gun.
The squirt gun has a compressed air tank like most others — more on that later — but to fire its primary ammunition, a nozzle that connects directly to an air compressor is needed. Again, like most guns of this nature, air is forced into the gun’s reservoir, displacing the pewter and expelling it out the gun’s barrel. Yes, pewter.
Working around the heat tolerances of thread seal tape, pewter has a low enough melting point that an airtight system is preserved — plus it’s really cool to fire a stream of liquid metal. The ammunition is made from pewter ware melted down and cast into pucks. These pucks are stacked into the gun’s magazine, melted with a propane torch and carefully loaded into the gun.
The built-in compressed air tank lacks the oomph to push out the pewter — hence the air compressor, but any lighter liquids or condiments are fair game for rapid-fire exercises. Yes, condiments.
Due to the low melting point of pewter, a humble pane of glass — or even, yes, a watermelon — can effectively stand up to the onslaught, but you probably don’t want to unleash this during the next water fight.
The last time we featured [TheBackyardScientist]’s shenanigans involving pewter he was casting it into weapons. If you have access to a 3D printer, you can cast yourself some pretty intricate designs.
[Thanks for the awesome tip, Itay!]