Arsenal Attachment/Inventory box does has odd behaviour with hints.
Many items that are too long do not give hints at all:
http://imgur.com/tX4dp2u
(mouse pointed and rifle tracer mag)
Some just show the wrong hint:
http://imgur.com/IJcKjUN
(mouse pointed at standard pistol mag)

This is not limited to mags it seems to happen on every section.

I feel like the bottom black text box on right should either scale its own size or scale its font size to make sure the complete name is in there. Some mods like ACE3 have very long mag names with similar stars making it more or less a guessing game.