Bartender
Can just buy lethal shotgun ammo
Box of Shotgun Darts - self explanatory
Beer Gloves - Throw glassware at someone for increased damage, if it hits head it stuns/mutes for a bit (Terraria reference woo)
Bluespace Ammo Mod - Increase the amount of shells that can be loaded in the DBS
Plastitanium Firing Pin - Converts some of the stam dmg to brute from nonlethal shells, and increases damage from lethal shells
Both of these would be visible on the shotgun, or when inspected says something about it being off
To balance you can only choose one
That’s all i can remember off the top of my head will add more later