"This wide-area attack weapon is most effective at close range."
The Shotgun is a weapon which is featured in Resident Evil: Dead Aim.
According to the Examine, it is a SPAS-12. It's a good gun to use in short and medium distances. Uses the Shotgun Rounds (7 rounds when it is fully loaded) and it's found in the Frigorific Chamber (in Medium and Hard modes; in Easy mode you will start the game with the gun), which is infested with sleeping zombies (when you take the shotgun and go out this zombies will wake up and try to kill the player).