What is the role of the primer in ammunition?

The primer's primary function in ammunition is to ignite the gunpowder when struck. This small component is located at the base of the cartridge and contains a volatile chemical mixture that produces a spark when impacted by the firing pin of a firearm. This spark initiates the combustion of the gunpowder within the cartridge, leading to the rapid expansion of gases that propel the bullet down the barrel and out of the firearm.

Each component in ammunition has a specific role, and the primer is crucial for the firing process. Without it, the gunpowder would not ignite, preventing the round from firing. The design of the primer ensures it is safe to handle and only ignites when struck with sufficient force, contributing to the overall safety of firearms when used properly.