All the gang member have their own custom sidearms, but as the player, Arthur has no particular favored gun that he has customized like John’s revolver or Micah’s revolver. If he did though, what would it look like. I would guess a cattleman with the pearl hero grip, since the cattleman is what you start with, what many members of the gang use, and it has a unique handle. The hero grip also has a eagle on it, and when you first visit Arthur’s grave, a eagle will be seen flying over the tombstone that can’t be killed, which could be symbolic of Arthur’s spirit. Idk though, what do you guys think?