Shotgun with decocking mechanism

A shotgun comprising:

• a) a receiver pivotally mounted to a barrel configured to receive a shotgun shell therein, wherein the receiver includes an external firing pin;
• and
• b) a trigger group comprising:
• i) a housing
• ii) an external hammer pivotally mounted on the housing;
• iii) a trigger pivotally mounted to the housing, wherein squeezing of the trigger is configured to cause the external hammer to pivot from a cocked position to a fired position whereby the external hammer strikes the external firing pin to fire the shotgun shell;
• and
• iv) a decocking safety lever selectively positionable between a safe position wherein squeezing of the trigger is prevented;
• a fire position wherein squeezing of the trigger pivots the external hammer from the cocked position to the fired position;
• and a decocked position wherein the external hammer is positioned in a decocked orientation intermediate the safe position and the fire position and wherein the shotgun is unable to fire the shotgun shell.