The Coat of Arms is an enchanted clothing item in Cactus McCoy 1.
Before, Hex Hatfield had two arms. But he found this treasure and since then he has two extra arms. It is a kind of curse but not like that of McCoy, so it acts more of an enhancement to the former. Because of the curse, he can now have two sharp cutlasses and two deadly pistols. It is unknown how Hex Hatfield came into possession of the jacket, although it was likely to have been obtained from acquired plunder.