More lighting at material when the light hit the weapon they could look more realistic.
I have see this on Contract war is a fb game and is one of the reasson i play this game.
When you change magazine and when you fire the light look amazing you feel like is a real gun .
I have one video from Contrac wars a idea how it looks the lighting on weapon . https://www.youtube.com/watch?v=a1Jc0CAG58s