What should always be done before cleaning a semi-automatic firearm?

Before cleaning a semi-automatic firearm, it is crucial to unload and clear the firearm. This step ensures that the firearm is completely free of ammunition, both in the chamber and in the magazine, which is vital for safety during the cleaning process. If a firearm is not unloaded, there is a risk of accidental discharge while handling or cleaning, which could lead to serious injuries or fatalities.

Clearing the firearm involves removing the magazine and then racking the slide to expel any residual rounds from the chamber. This practice is a fundamental safety procedure that should be followed every time a firearm is handled, particularly before maintenance tasks like cleaning, as it establishes a safe working environment.