I can't buy Heavy Shot

Hi!
I have purchased before Multishot, I have 10k+ marks, but only I can get Mind Over Matter and Asceticism. My archer is lv 40.

Why I can not get it?

Sorry about my english =)

Have you been doing every class quest offered so far? Each quest offered by your guild unlocks a new tier of things you can purchase with guild marks.

Class quest! it should be! Thank u so much! =)

I believe if it's in grey, it means you haven't done the quest yet. If it's white, you can buy it (once you have the marks)