The P40 can also be purchased with an external safety and a loaded chamber indicator.

Others, such as requiring loaded chamber indicators, are controversial.

The pistol also has a loaded chamber indicator viewing opening on top of the slide.

A special model also features a manual safety and a loaded chamber indicator.

It also features a loaded chamber indicator and a trigger safety.

The action also features a loaded chamber indicator.

Addition of a visible loaded chamber indicator on the left side.

A small pin protruded at the rear of the slide as a loaded chamber indicator.

A chamber indicator, in the form of a pin inside a tiny hole, is provided on the left side of the slide.