Talk:Affinity/@comment-200.9.111.36-20150831165300/@comment-222.165.65.6-20150905202911

If you use a Warframe to get a kill, 100% of the Affinity goes to the Warframe.

If you use a weapon, that weapon gets 50%, Warframe 50%.

So to level it up, you have to actually use it.

Just do high level Spy Missions. 12k XP per stealth Data. 36k in total. This is split between your WF and all weapons equipped.