the Type- 803 ERC (Enhanced Revolver Carabine) Grom III it's the latest descendant as the name suggest of the succesful Type-801 Grom Revolver, it's a weapon that is quite heavy for the size it have but it's well balanced and you need weight to fire the massive .600 KE magnum rounds (6 shots drum with .600 7 shots with .500 S&W) it's also useful because the .600 KE type ammo can be fitted for differnt tasks there are hollow point, THV, FMJ rounds but also more specialized rounds like the pellet shell, the flechette round, and even the dragon breath rounds and the micro grenade round