Which of the following is a type of action used in modern firearms?

The choice of bolt action rifle as the correct answer highlights an important type of action used in modern firearms. In a bolt action rifle, the shooter manually operates the bolt to chamber a round, eject the spent cartridge, and load a new cartridge into the chamber. This mechanism is known for its reliability, accuracy, and simplicity, making it a popular choice for many hunting and shooting applications.

The bolt action provides a solid lock-up of the cartridge in the chamber, which contributes to the improved precision of the firearm. This type of action has stood the test of time, as many manufacturers have developed various models that feature this action due to its effectiveness in delivering consistent performance.

Understanding bolt action rifles is essential for anyone learning about firearms, as it represents a fundamental design that has influenced countless hunting and sporting rifles used today.