What components are included in the magazine assembly of the service rifles?

The magazine assembly of service rifles typically consists of several essential components that work together to ensure the reliable feeding of ammunition into the firearm. The correct answer includes the back plate, guide spring, follower, and magazine body.

The back plate serves as a closure for the rear of the magazine, holding the internal components in place. The guide spring, often referred to as the spring, provides the necessary tension to push the rounds upward. The follower is a critical component that sits on top of the spring; it pushes the ammunition into alignment for feeding into the chamber when the rifle is cycled. Finally, the magazine body is the outer casing that houses all these components and holds the ammunition.

These components are fundamental to the operation of service rifles, ensuring that they function reliably in a variety of conditions, maintaining the efficiency of the firearm. The other choices contain terms or components that do not accurately represent the standard terminology or structural elements found in a typical rifle magazine assembly. This distinction is crucial in understanding the design and operation of military service rifles.