I could fucking build something like that myself that could be reloaded and reused in like, an afternoon. CG muzzle flashes are ass but you could just build a gun around a BBQ starter, using the same trigger with the tip hidden by the barrel, then just pop a tiny satchel of gun powder at the end of the barrel and feed a small wick inside. If you want repeated fire, hire someone. Otherwise you don't get to fire more than once without a cut which isn't a huge deal. Source: I did this before and though it was a bit slow to shoot, this shit was being done for like $200. The tip of the barrel gets burned to all hell and a bigger flash and more smoke would have been really nice but there's only so much explosives I'm willing to DIY and fuck with, you go from cool prop to actual weapon real fast.
I could fucking build something like that myself that could be reloaded and reused in like, an afternoon. CG muzzle flashes are ass but you could just build a gun around a BBQ starter, using the same trigger with the tip hidden by the barrel, then just pop a tiny satchel of gun powder at the end of the barrel and feed a small wick inside. If you want repeated fire, hire someone. Otherwise you don't get to fire more than once without a cut which isn't a huge deal. Source: I did this before and though it was a bit slow to shoot, this shit was being done for like $200. The tip of the barrel gets burned to all hell and a bigger flash and more smoke would have been really nice but there's only so much explosives I'm willing to DIY and fuck with, you go from cool prop to actual weapon real fast.