SpudFiles

I know perfectly well what grren gas is. Hell, i have an adapter so I can fill my airsoft pistol from a propane tank. If we are referring to a cannon, however (the poster doesn't seem to want to tell us) then you are releasing quite a few times more gas. Also, he mentions 'constant fire', which tells me he intends a stationary mortar type device, using large chamber volumes (comparably to a pistol). Releasing moles upon moles of propane in one location just spells disaster.

The fact that this is in the pneumatic cannons section and not Airsoft/BB Guns leads me to believe this is a 'cannon', and not a single shot or even 'shotgun' type 'weapon'

Also, the C3H8 used in PB guns (the C3) is ignited.
(Shit, is that why it is called the C3? Hmmm...)

I see. I figured it was a small side arm not a mortar, but yeah I see how that would be dangerous. I dont think a pb mortar is ever going to be mobile without a bulky tank.