There are a ton of great weapons in Red Dead Redemption 2 but some of them you’re going to have to seek out to find. The Semi-automatic shotgun can be found by exploring the open world and is located at Watson’s Cabin.
The cabin is in the northern part of West Elizabeth and you’ll find it by entering the house that is west of Wallace Station and just north of the Little Creek River. Upon reaching the house, you’ll talk with a woman who says she’s been waiting for you. Obviously a mistake, she tells you to put the loot in the house’s cellar. The cellar is located inside the house in the back.
Once you reach the ladder, just head down and then search a bit for the Semi-Auto Shotgun.
You can use the map above to find the exact location of Watson’s Cabin and the shotgun.
The shotgun itself is one of the more powerful shotguns in the game because you won’t need to reload it as often as you will some of the others. The semi-auto shotgun allows you to fire off 5 shotgun rounds before needing to reload.