inert, totally prop gun that can t fire that is just to look correct. you could have a rubber gun so a stuntman can use the same gun to fall over or in a fight sequence, and then you might have a gun that can fire a a blank round. so you can produce the kind of effect you want to see on screen such as a flash or a bang or the recoil. so you mentioned there could be rubber guns, you could have a gun that fires blank rounds. if it s a real gun, is it most likely on set that it has been modified in some way to make sure that it either is only capable of using blank rounds or nothing at all? not necessarily, no. most single-shot firearms don t require any changes to them to fire a blank round. so normally they re exactly the same as they would be, they re unchanged. when you talk about s