Which part of a firearm is operated to release the magazine?

The part of a firearm that is specifically designed to release the magazine is known as the magazine release. This mechanism is usually positioned on the firearm’s frame and is activated by the operator, allowing them to eject the magazine safely and efficiently when reloading. The magazine release plays a crucial role in the functionality of the firearm, ensuring that the user can quickly swap out magazines during use.

The other components mentioned have distinct functions: the safety or decocker is responsible for engaging or disengaging the safety features of the firearm to prevent accidental discharge, the trigger guard is a protective enclosure around the trigger to prevent accidental discharges caused by external factors, and the sights are used for aiming the firearm. None of these parts directly contribute to the operation of removing or releasing the magazine, highlighting why the magazine release is the correct answer in this context.