that we didn't miss anything and that you're comfortable with the fact that it is, in fact, an empty firearm. >> and i'm comfortable. wonderful. >> reporter: this is what a blank looks like. >> it's a cartridge case that's crimped over. you can see there's no projectile. >> reporter: no bullet or projectile. >> no bullet or projectile. >> it has gun powder. >> it does have gun powder. it has a primer in it. this is what's called a modern theatrical blank. >> reporter: but under safety regulations, such a bullet -- >> is a dummy cartridge? >> empty shell case, no gun powder in it, totally inert primer. it can't go bang. there is a projectile on the end of it. but you can see, there's a bb. i can rattle it next to your ear. >> no gun powder in it. >> if means that cannot go bang. >> reporter: there many other mandated precautions. >> so we have our single-action revolver. we have our blank cartridge. you can see there is no projectile. i've measured out 20 feet for you here, which is the minimum-safety distance on a film set.