What must you always do before crossing obstacles with a firearm?

Before crossing obstacles with a firearm, it is essential to unload the firearm. This action significantly reduces the risk of accidental discharge while navigating potentially dangerous situations, such as crossing fences or streams. By unloading the firearm, you eliminate any live ammunition from the chamber and the magazine, ensuring that the firearm is in a safe state. This procedure follows fundamental firearm safety rules, which prioritize the safe handling of a loaded firearm and the prevention of accidents.

While other options may involve important safety practices, they do not address the fundamental requirement of unloading the firearm, which is critical when traversing obstacles. Following this guideline helps maintain safety not only for the shooter but also for those around them.