That is a swing cylinder revolver. It has a double action. There are also single action revolvers with a gated cylinder, (think cowboy movies). There are break barrel revolvers with single or double actions. There are bolt action rifles and shotguns where the bolt seals the breach. Semi auto rifles, shotguns, and handguns also generally have a bolt that seals the breach. Pump action shotguns and rifles are also a thing, kind of halfway between semi auto and bolt action.
Pedantry incoming!
That is a swing cylinder revolver. It has a double action. There are also single action revolvers with a gated cylinder, (think cowboy movies). There are break barrel revolvers with single or double actions. There are bolt action rifles and shotguns where the bolt seals the breach. Semi auto rifles, shotguns, and handguns also generally have a bolt that seals the breach. Pump action shotguns and rifles are also a thing, kind of halfway between semi auto and bolt action.
I don’t know of a “breach action.”
Pedantry ends.
It’s a breach action because it is backwards.