That's a Fanner 50 revolver. Back in the 50's, every little boy had a set of them. Also, the guns used in the more popular TV westerns were big hits at Christmas time. How well I recall the smell of exploding caps.
Yes. We were never allowed to have one, though (mm hated them). When my brother managed to "smuggle in" a roll of caps, we'd used rocks to set them off. A large river rock dropped on an entire roll of caps either went BOOM! or clunk - either way we'd get sent to our room. He also "smuggled in" a cap bomb. Took mom nearly a year before she finally found and confiscated it.