Introduction: 2" Coaxial Prototype

About: AKA Roborovski, and Cowscankill for several years. I'm a mechanical engineering undergrad.

A better one will be posted later. This is a demo video of my current air gun.
This is a coaxial piston gun.  The blowgun trigger is my pilot valve.  The piston is 2" with a built in check valve.  The barrel is 1/2" smooth bore.