Which of the following is not a component of a typical rivet gun?

A typical rivet gun is a specialized tool used for driving rivets, and its components play specific roles in facilitating this process. The hammer in a rivet gun is not a standalone component like others listed; instead, it is an action created by the mechanism of the rivet gun itself. The primary components of a rivet gun include the rivet set, which shapes and drives the rivet, and the pneumatic motor, which powers the gun using compressed air. The air hose is essential for supplying this compressed air to the pneumatic motor, enabling the entire operation.

In contrast, the term "hammer" can be somewhat misleading in this context, as it does not represent a distinct, interchangeable part in a typical rivet gun setup. Rather, it describes a function of the tool rather than a component that can be replaced or serviced independently of the gun's overall mechanism. This distinction clarifies why the hammer is not considered a core component of a standard rivet gun configuration.