Paintball pistol

 Just so you know the picture is not my design and it is from a Tippmann A5. I am looking for help in designing the first open source diy paintball pistol. Before anyone comments and says that this is to dangerous to do I want you to know that I have studied the breaking points of PETG and the mechanisms of paintball guns; this design would use a regulator which would bring pressure down to a safe amount for the plastic, also all parts will be tested with an air compressor at 50 psi before they are used in the gun. If this still does not convince you that it is safe then look up 3d printed hpa engines for airlift and nerf, this uses the same principle. I think that I have the main mechanism figured out for both a full auto pistol and a semi auto pistol. The pistol would operate off of a 12g co2 cartridge and use a 3d printed valve assembly with a return spring for firing. The trigger initiates the firing cycle by creating a difference of air pressure resulting in the bolt moving forwards. For semi auto firing, the air from the trigger escapes after the trigger has been released; for full auto firing the air escapes from the trigger once the bolt travels to the maximum distance, this resets the bolt and refills the trigger valve. If you are interested in helping and/or have ideas let me know.

"All that was great in the past was ridiculed, condemned, combated, suppressed — only to emerge all the more powerfully, all the more triumphantly from the struggle." - Nikola Tesla