Colorado Hunter Education Practice Exam

Which of the following is NOT one of the three main parts of a modern firearm?

1. Action

2. Stock

3. Barrel

4. Trigger guard

The correct answer is: Trigger guard

The three main parts of a modern firearm are the action, stock, and barrel. The action is the mechanism that loads, fires, and ejects the cartridge. The stock is the handle or grip of the firearm, which provides a holding position and supports the weapon against the shooter's shoulder. The barrel is the long, metal tube that directs and guides the bullet. Therefore, the trigger guard is not one of the main parts of a modern firearm as it is primarily a safety feature and does not play a direct role in the functioning of the weapon.