Can you provide a picture of the quick disconnect w/ the schrader adaptor?

If you can use threaded steel, then do it, it'll handle ridiculous pressures, and dwarf any similar PVC launchers. 600PSI wouldn't be a stretch for it.

Wouldn't it also be heavy? How expensive would it generally be ...

What calibre/s are you planning on, and what performance do you expect?

If I can't figure out a way to adapt a bolt action mechanism or the sleeved barrel design you showed me to work with changing barrels, then I'll stick with a 1 1/2" barrel primarily suited towards golf balls.

What calibre ...

Hi, I'm new here at spudfiles, and this is my first post. I've been looking to make my own spudgun for some time now, and since I'm located in CA, I'm restricted to making pneumatic spudguns.

I'm planning to make an over/under style pneumatic handheld spud gun with some form of a bolt-action ...