Remington Mark III Single shot 10 gauge pistol. This is Lu Wan's huge handgun. Hiram calls it a "derringer" when he hands it to her, but this is meant as a joke. She uses it to blow off the tentacle head when she and Fu Yien are attacked in the wagon. This is an impressive looking weapon but in reality its only purpose was to fire a special shell which would propel a signal flare into the air. This gun is also slightly out of period because it was actually manufactured from 1915-1918. But S. S. Wilson and Michael Gross loved it so much they decided to use it anyway, theorizing that such a pistol could have been made by any competent gun maker of the period.