[Update 7.10.0: Weekend Extermination Event!]

If you killed Fusion MOA(s) AFTER the bar reached 100%, you'll get the reward AFTER the event is done, which is approx. 16 minutes again... According to the previous posts.

But the event has finished now, I also tried to relog but nothing.

[Update 7.10.0: Weekend Extermination Event!]

No seriously, I did it before the end. When I finished the mission and killed fusion moa it said 5 min left, so I did it in time. But I don't have that freakin' blueprint!

[Update 7.10.0: Weekend Extermination Event!]

Well I killed more than 1 Fusion Moa, but I don't see any credits or blueprint.

[Glaive Assessment]

Fun fact: It's actually just a faster version of a skana in melee range (except the skana is longer, of course) and it still beats a good part of "rare longswords" and gauntlets as for normal hit DPS...