>>63996834
You absolutely cannot. Pla will break if you use it to puncture the seal on a c02 cartridge
>just go buy the fitting at a hardware store
Oh cool, now I have to design it myself, and completely remodel the plastic pieces in autocad to accept the pressure chamber? This is a cartridge piercer, its a hollow needle. You can't do this with pla, and anyone with the knowledge to make this themselves could literally just design and make a firearm, which is easier to make than an airgun.