Which of the following practices should be avoided to maintain firearm safety?

Using firearms under the influence of substances is a critical practice that should be strictly avoided to ensure firearm safety. Substances can impair judgment, coordination, and reaction times, significantly increasing the risk of accidents and mishandling firearms. When a person is under the influence, their ability to assess situations, respond to emergencies, and follow safety protocols is compromised. This can lead to dangerous situations not only for the user but also for bystanders.

In contrast, the other practices listed demonstrate responsible behavior around firearms. Regular maintenance and cleaning are essential for the reliable functioning of a firearm, while using protective gear helps to minimize the risk of injury during shooting activities. Checking ammunition compatibility ensures that the firearm operates correctly and safely, preventing malfunctions that could pose hazards when shooting. These practices are fundamental to firearm safety and help create a safer environment for everyone involved.