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Guns work by using a spring-loaded firing pin to strike the primer at the base of a cartridge. This mechanical impact creates a tiny spark that instantly ignites the gunpowder packed inside the metal casing. The gunpowder burns rapidly, transforming from a solid into massive volumes of trapped, expanding gas. This rapid combustion generates immense pressure inside the sealed chamber of the firearm. Because the pressure needs an escape route, it pushes against the path of least resistance: the bullet. The expanding gas forcefully detaches the bullet from its casing and drives it down the metal barrel. Inside the barrel, spiral grooves called rifling grip the bullet to spin it like a football for stability and accuracy. Once the bullet exits the muzzle, the trapped gas escapes into the air, creating the loud "bang" of the gunshot. Finally, the mechanical action of the gun utilizes the leftover energy from the shot to eject the empty casing and chamber a fresh round.Would you like to explore how semi-automatic mechanisms use this leftover