Ok, thanks for the mod

The gun grouping can prob be done. I'll try to do it when I have time next.
As for manufacturing .50 and slug though, those are kinda beyond the scope of this mod. This is meant as a patch, not really an expansion.

e.g., some items are meant to be rare(?) and non-craft able. If it is to be done, it should prob be done as a separate mod, so people can choose whether they want it or not.

.50 bullets and slug bullets should be added to the crafting recipe

Two guns with the same accessories can be purchased separately in the Merchant's backpack to update the bullets in unlimited quantities, please separate the guns

Sawn-off Shotgun and Super Shorty Shotgun can't use slug

Ok turns out to be straight forward. Common is used by both story and sandbox anyways.
I've added carbon arrows as ammo for the recurve bow but I don't have to time to test thoroughly until after weekends. So pls report any bugs if you find them.

I've personally never seen carbon arrows before. Where did you get it in-game?
I did a quick search and found that carbon arrows is not part of "base story" but common module for quests. I'll check more carefully when I have more time after weekends. If there are no dependency problems (like potentially introduce unnecessary dependency), I can add it in.

Need recurve bow can be used
Carbon arrows