Guild Wars 2

So I was unlocking all the reclaimed weapon skins and it progressed an achievement that was dark green. I’ve got them all unlocked as far as I can tell and the achievement hasn’t popped up as complete in the summary page. I didn’t catch the name but I can’t find it either. Anyone know what achievement they progress?

I am looking for these weapons too.
Can you tell me please in which specific map do they drop?