"The third safety feature added to the Ruger pistol is a loaded chamber indicator. This is a thin metal bar, the rear of which protrudes slightly from the left side of the receiver when a cartridge is present in the chamber. This device can be easily seen, and can also be felt with the shooter's finger. The bar is activated by a spring-loaded piece of steel that touches the rim of the chambered cartridge. I was concerned that this could possibly fire the cartridge if the gun were to be dropped on a hard surface, landing on the loaded chamber indicator; admittedly a remote possibility, but a concern nonetheless. To test this feature, I loaded the chamber with a live cartridge, and could easily push in on the bar. It would push flush with the receiver. I then pointed the muzzle downrange, and tapped the bar with a heavy brass hammer. No matter how hard I smacked the loaded chamber indicator bar, it would not even leave the slightest mark on the cartridge rim, and cannot fire the pistol if dropped."