Enjoy your new confirmed farming method, and your 4 uniques that can spawn with luneshine.
The weapons are considered blue rarity (at least the Jack ‘O’ Cannon). Below is the tread on the recipes for how to grind blue guns and blue guns w/ luneshine for those that need it.
2 green shotguns, a green rifle and 69 moonstones.
This is what used so they are definitely blue. And the above is the best I found for a blue SG w/ luneshine, there’s another recipe but it cost 105 moonstones.