I think this would make people allot more interested in them. Like a reload buff or damage for certain weapons or grenades allot of ways these can be made customizable and variations for same ones. I have the twin eagle one from the speaker which changes color depending on exp or PvP kills I'm not sure which it is yet to be honest but it could get a buff like damage increase for chain killing without dying idk these are suggestions. Depending on rarity better buffs e.t.c.