YouTube - MadBull Airsoft new toy, prototype
Might have some FPS issues.
CRAP. Unless of course I use 5 bb's in the shell.
YouTube - Stryke Airsoft: Mad Bull Shotgun Shells 6mm Review Part II
Guess I can always use propane and it will reduce FPS.
EDIT. The top link is with CO2 and the bottom link is with PROPANE.