Springfield Armory XD

Two powerful features in the design are the striker status and loaded chamber indicator. The loaded chamber indicator is a minuscule button, just above the breech on apical of the gun's slide, which pops up when a bent is in the chamber.

The handgun kisser four or five shelter mechanisms

The first Springfield Armory XD is called a 'trigger safety', similar to that found on Glock handguns
The trigger safety requires the shooter to depress a secondary embedded trigger while pulling the cardinal trigger.