My idea is accessorie that would be a steaths for swords, a holsters for guns, and bomb bag for bombs. You would get these accessories from a look box like any other but when bound to different weapons they look different. Higher star weapons would have cooler visual effects so this would appael to higher level kinghts

Steaths: would be at your side or on your back depending on the weapon or armor. Ex the Cold Iron Vanquisher could have chain dangling from the steath

Holsters: would be at your side. Ex The Argent Peacemaker could have a sliver holster and have the golden wings sticking out the sides of it

Bomb Bag: dont now how this would work out really but I didnt want to leave bombs out.