I don't know if anyone else is seeing what I see, but this riven is telling me one thing when not equipped, and another when equipped. when not equipped, it says stats are
+228 damage
+129.7 multishot
+98 cold.
When equipped gives
+78.6 damage
+44.7 multishot
+33.8 cold.
it is fully maxed. I have removed all mods and had just that one on. same stats as equipped.