The term “action type” describes how a firearm loads, fires, and ejects a projectile. There are several different action types for handguns and rifles. Handguns usually come in two main action types, including semi-automatic and revolver. A revolver can have either a single-action or double action. Semi-automatic handguns can have action types that include, double-action, single-action, double-action/single-action, or striker-fired. Rifles typically have action types that include single shot, bolt-action, lever-action, pump-action, or semi-automatic. And some rifles even use a hammer-fired action type. See Double-Action or Single-Action for more information.