How does a Shotgun works?

[aks1296]

What parts does it contains? Does it has a firing pin like rifles use? How does the ejector mechanism works in shotguns? Does Double Rifles (elephant guns) and shotguns are same thing?

Added in 2 hours 10 minutes 27 seconds:
Can anybody tell me?

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[aks1296]

Can anybody tell me?

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[TwoRivers]

Any gun, whether rifle or shotgun, firing a cartridge requires and has a firing pin(s). The ejector mechanism is cocked either by the opening or closing motion of the gun, and released to eject the fired shell by the firing of the gun. Rifles are rifles, i.e. with rifled barrels. Shotguns are smooth bore guns. SxS shotguns and rifles are identical in construction, except for rifles requiring sturdier construction and barrels because of much higher pressures.

[aks1296]

@TwoRivers , Then does double barrel rifles and dbbl shotguns have the same parts?

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Added in 33 seconds:
I know that double rifles are very expensive.....

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