"An old-fashioned shotgun. Doesn't hold much ammo, but packs quite a punch."
— Inventory description
The M21 Shotgun is a weapon that appears in Resident Evil 7: Biohazard.
Initially a Broken Shotgun, it is used as a placeholder until the player finds the Model Shotgun. The player can repair the Broken Shotgun by combining it with a Repair Kit; either very early on by sacrificing the M37 Shotgun and broken handgun, or much later without sacrificing the other 2 weapons' availability.
A classic over-under style shotgun; holding only 2 shells compared to the M37 Shotgun but offers more firepower per shell, heavier knock back power, and concentrated blast ergo better effective range.
Its heavier knock back power compliments the P19 machinegun well for mid range sustained engagement.