>>513022788
Theres ways, but I don’t bother since it’s actually easier to just go the legal route.
If it really came to it someone who was determined could do it though

I saw a guy make a gun out of literal tampons and an air compressor earlier. Anything can be a projectile if you want it to be.
Also ammunition isnt the only commercially available things that use smokeless powder, it’s used in heaps of shit
https://youtube.com/watch?v=FFe4x-rSL7c