Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
I believe its how much it can be stressed until it fails. They probably epoxied some metal together and pulled it apart with those strength testing machines.
I am unsure as to how it works under air pressure but I strongly believe that it will hold up to 250psi.