With the fairly recent discovery of the Gun Class system in Gungeon, and with how it impacts what guns you get throughout your run, how is one supposed to memorise the classes of each gun, especially when modded guns come into play?
To learn more about this elusive feature that escaped watchful eyes for about 5 years, you can watch this video made by a friend.
This mod adds an extra line to each guns ammonomicon entry that states what Gun Class it belongs to.