Which of the following firearms has a lever or pivot safety located on the bolt to lock the firing pin?

The correct answer is a rifle, as many rifles are designed with a lever or pivot safety mechanism that is integrated into the bolt assembly. This type of safety feature serves to lock the firing pin, preventing the firearm from discharging unless the safety is disengaged.

This design adds a critical layer of safety, particularly during the loading and unloading processes, ensuring that the firearm does not accidentally fire. Lever or pivot safeties in rifles allow for quick and intuitive operation, making them easy for shooters to engage or disengage as needed.

Other types of firearms, such as shotguns and revolvers, utilize different safety designs that may involve manual safeties on the trigger guard or frame rather than on the bolt. A crossbow, on the other hand, operates on a different principle altogether, using a string and limbs rather than a firing pin mechanism, which makes the question of a firing pin safety mechanism inapplicable.