Which of the following is a component of a rifle's sight system?

Windage adjustment is a crucial component of a rifle's sight system as it allows the shooter to make horizontal corrections to the point of aim. By adjusting the windage, a shooter can compensate for factors such as wind drift or misalignment, ensuring that the bullet travels towards the intended target effectively. This adjustment is essential for accuracy, especially over longer distances, where even small deviations can significantly impact the bullet’s path.

Unlike windage, the options regarding elevator adjustment, nozzle attachment, and trigger guard feature do not pertain to the primary sighting functions of a rifle. Elevator adjustments, while related to vertical corrections, typically fall under different terminology, often referred to as elevation adjustments. Nozzle attachment refers to components not generally associated with sight systems, and the trigger guard feature is part of the firearm's safety mechanism and does not directly influence aiming. Hence, windage adjustment stands out as the critical component of a rifle's sighting system.