It can be found under the mattress of the northernmost shack and jail cell at Horizon's Rest.
I can't believe Ella convinced everyone to pool their weapons and lock them in the armory hanging from the tower.
That idiot's been running the show ever since we left Helvetia, but I think it's time for a change.
I stole her key to the armory and left it under the flowerpot in my shack. Let's see her try to call the shots now.