Which part of the rifle is specifically designed to hold against the shoulder?

The butt of the rifle is the part specifically designed to rest against the shooter’s shoulder, providing stability and support while aiming and firing. This design helps absorb recoil when the rifle is discharged, allowing for better control and accuracy. The shape and padding of the butt also ensure a comfortable fit against the shoulder, which is essential for effective shooting stance and overall firearm handling.

In contrast, the forestock is positioned at the front of the rifle and is used to hold and control the firearm while aiming. The magazine is the component that holds ammunition and feeds it into the chamber, while the trigger guard serves as a protective barrier around the trigger to prevent accidental discharges. None of these components are intended for shoulder support during shooting, making the butt the correct choice for this question.