I don’t think the center is a barrel. The more I look at it the more I think you’re supposed to manually revolve the barrels. It seems like the top one might be designed to get hit by the external striker mechanism. But maybe there’s some system inside the gun we can’t see.
The mechanism likely also locks the barrel in place somehow, so you revolve with one hand and cock it with another. Compare it to this revolving zip gun that doesn’t even bother with a trigger.
I don’t think the center is a barrel. The more I look at it the more I think you’re supposed to manually revolve the barrels. It seems like the top one might be designed to get hit by the external striker mechanism. But maybe there’s some system inside the gun we can’t see.
The mechanism likely also locks the barrel in place somehow, so you revolve with one hand and cock it with another. Compare it to this revolving zip gun that doesn’t even bother with a trigger.
https://homemadeguns.files.wordpress.com/2018/08/revolverzipgun_b01.jpg
That’s what I’m thinking too.