No brainer - XS Sight Systems Big Dot Tritium for Shotgun

Anyone who has been around shotguns knows about the brass bead and how to use it. Simple, inexpensive, and most importantly, effective. The big dot is fantastic for any shotgun. It draws your eye and is easy to use. The hardest part is just mixing up some jb weld and sticking it on. After that you’re good to go. Pro tip: let it set before you get impatient and go shoot because it will try to fly off.