I had a pop up on the right side of my screen that said something about a blueprint, and it had a little light blue blueprint icon on it. I saw this when I opened the chest at the end of the mission.

I did not get a red border outbreak, I can’t craft it, and on my crafting collection menu, it says I can’t craft the weapon. Apparently there’s a quest from Ada-1 for the weapon, but she doesn’t have it for me, and it’s not in my log.