Which component is directly responsible for starting the firing process in a bolt-action rifle?

The component that is directly responsible for starting the firing process in a bolt-action rifle is the trigger. When the shooter pulls the trigger, it engages a mechanism that releases the firing pin. This action allows the firing pin to strike the primer of the cartridge, igniting the gunpowder and ultimately firing the bullet. The trigger is essential for this process, as it serves as the interface between the shooter’s intent and the actual operation of the firearm.

Other components, such as the bolt handle, safety, and forend, have important roles in the operation and safety of the rifle but do not initiate the firing sequence. The bolt handle is used to cycle the action and chamber a round, the safety is a mechanism designed to prevent accidental discharge, and the forestock contributes to the stability and handling of the rifle, but none of these components are responsible for actually starting the firing process.