What is a primary safety feature on semi-automatic pistols?

A primary safety feature on semi-automatic pistols is the manual safety lever or grip safety. This feature is designed to prevent accidental discharge of the firearm by requiring the user to intentionally engage or disengage the safety prior to firing. When the manual safety is engaged, it physically blocks the trigger or firing mechanism, ensuring that the pistol cannot be fired unless the safety is released. The grip safety, on the other hand, requires the shooter to have a proper grip on the firearm before it can be fired, adding an additional layer of safety. This dual safety mechanism is especially important in preventing unintentional discharges that could occur from mishandling.

In contrast, while built-in lights can enhance visibility in low-light situations, they do not contribute to the firearm's inherent safety features. The overall weight and the caliber of ammunition used can affect handling and performance but do not directly address the prevention of accidental discharges or enhance the safety of the operation of the firearm.