What indicates that the safety/function checks have been successful?

The indication that the safety and function checks have been successful is determined by whether the weapon is mission ready. A weapon being mission ready signifies that all necessary operational checks have been performed correctly and that it is safe to use and capable of functioning as intended. This includes verifying that all safety mechanisms operate properly, the magazine feeds as it should, the trigger responds correctly, and the slide operates smoothly.

In this context, checking for a 'mission-ready' status ensures that the weapon is fully operational and safe, which is the ultimate goal of performing safety and function checks. This status confirms that the various components and systems of the weapon have functioned correctly in their checks.