What is a common mechanism to ensure safety and prevent accidental discharge of a firearm?

A trigger guard is a common safety feature designed specifically to prevent accidental discharge of a firearm. By encasing the trigger area, the trigger guard helps to protect against unintended activation of the trigger, which can occur if something inadvertently makes contact with it, such as clothing or other objects. This is especially important during handling, carrying, and storage, as it creates a physical barrier that requires deliberate access to engage the trigger.

In comparison, striker fire mechanisms refer to a type of firing action that impacts how the firearm discharges but does not directly address preventing accidental discharge. The frame provides the structure for the firearm and houses its components but does not serve directly as a safety feature to prevent trigger activation. Sights are designed for aiming and targeting but have no role in enhancing the safety of the firearm itself. Therefore, the trigger guard stands out as the most relevant option for ensuring safety and preventing accidental discharge.