It is an early firearm that originated in 16th century Europe and is the successor to the matchlock gun. By using flint and gunpowder to ignite bullets, they can be fired. The working principle is that when the trigger is pulled, the flint will rub against the gunpowder to produce sparks, igniting the gunpowder loaded in the barrel and pushing the bullet out. Compared to previous matchlock guns, it is more reliable because it does not rely on a continuously burning matchlock to ignite gunpowder, reducing the risk of ignition failure caused by wind or humid weather. The emergence of flintlock guns greatly increased the firepower and range on the battlefield, while also reducing the exposure time of soldiers when loading ammunition.