Weapons

It's in the cellar.

Entrance to the cellar.

You will visit this place during the Paying a Social Call mission.

Begin The Noblest of Men, and a Woman mission and defeat Flaco Hernández in a duel. You will find the gun next to his corpse.

Begin The Noblest of Men, and a Woman mission and defeat Emmet Granger in a duel. You will find the gun next to his corpse.

You can find this gun in the basement of the gunsmith's shop. In order to get there you have to rob the Shop Robbery: Rhodes Gunsmith.

You'll find it next to Micah's corpse when you complete the American Venom mission.

Begin The Noblest of Men, and a Woman mission and defeat Emmet Granger in a duel. You will find the gun next to his corpse. Talk to a railway station clerk and he will tell you that Billy Midnight should be on one of the next two trains.

The gun is in a chest located in a small cave.

Kill the hermit and pick up the shotgun.

You can find this gun in the back room of the doctor's office. In order to get there you have to rob the Shop Robbery: Valentine Doctor's Office.

It's in the basement of the cabin.

It's in the mine. Press the plunger at the entrance to blow up the rocks in the way.