How is the cannon fired?

There is also a firing pin, but the firing pin is mounted on the bolt and you can't see it. A long rope is usually used to pull the firing machine when shooting, because the shock wave is very strong when shooting large artillery. Gunners can shoot away from the muzzle through long ropes to reduce the impact of shock waves on the human body. Small guns also have a firing handle similar to a trigger, which can be fired directly at the tail of the gun.

Since the 1950s, modern guns have used the energy of the back seat of the gun to automatically unlock and throw shells backwards by using the automatic breech. In the past, when breeches were unlocked manually, there was a mechanism to pull out the shell casings.

Many guns use explosive charges instead of shell casings. The explosive charge has no metal shell, and it basically burns after ignition without throwing off the shell at all.

For a gun without automatic loading mechanism, a new cartridge case must be pushed into the bore by a manual loading push rod.