Airsoft to Nerf conversion

A little mod I cooked up for my gas-powered airsoft pistol. It uses standard 14mm negative threads to attach to a gas-powered pistol or rifle. Version 1 is designed longer on purpose as trimming off the end manually creates a better path and flight for some reason. Version 2 uses a shorter barrel and a slightly different method of propulsion. Just for fun, let me know of any criticisms. To see it in action here's an unlisted youtube video of it.
https://www.youtube.com/shorts/ulGDrw-Ol_U