OK - you guys want to see pictures - I have got some.... the smoke is real - immediately after firing a shotgun cartrdge (blank) - the sound and smoke is awesome. You can see the blank firing mechanism that looks like a revolver.
As you can see these vehicles take up a lot of space in my home....
They are are called 12 gauge blanks here in the UK - they have only half the gun powder from usual due to the noise and recoil from a full cartridge. I have purchased the custom made cartridges in the specified size to keep things within sensible limits but I must say I have fired a full sized cartridge and nearly jumped out of my skin!! The cartridges are the size of a wine cork. If you look at the picture carefully you can see the muzzle flash within the smoke. The barrel is over 3 feet long and I am telling you when you use a full sized cartridge the fire spits out so violently that it ends up damaging the barrel.