Handking's weapon are not meldable

[Avik]

All yellow scripts accessories ilvl 350 are convertible, but weapons and armor are not. Why is that ? They are fairly long to spiritbond, and i think they should be convertible. Is it intended for 5.0 or did SE just forgot ?

I get why you would make them unconvertible in 4.0, but not now.

EDIT : What i mean is, you cannot transform them into materia
PS : sorry english is not my native language