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What type of firearm ignites the primer by striking the rim of the cartridge?

  1. Centrefire

  2. Rimfire

  3. Shotgun

  4. Revolver

The correct answer is: Rimfire

Rimfire firearms are designed to ignite the primer located in the rim of the cartridge when struck by the firing pin. This type of ammunition is distinct because the primer is contained within the rim of the cartridge case, and the ignition occurs at the edge rather than in the center, as is the case with centrefire cartridges. In rimfire cartridges, the design facilitates a more straightforward and often less expensive form of ammunition, commonly used in smaller caliber firearms like .22 long rifle. The firing mechanism relies on the firing pin making contact with the rim, causing the primer to ignite and subsequently firing the bullet. The other types of firearms mentioned do not operate under this mechanism. Centrefire firearms require the firing pin to strike the center-mounted primer, while shotguns can utilize both rimfire and centrefire ammunition, depending on the design. Revolvers are typically used with centrefire cartridges, but they also can operate using rimfire cartridges if designed for them. Understanding these distinctions is key in identifying which type of firearm utilizes a rim-striking ignition system.