I would like a list with all the one hit kill weapons.

In some rare cases the knife can kill in one hit. Not sure if it's actually a headshot or not, as I never heard the plink sound yet I got 1 hit killed from full hp/shields.

Just to be precise here: Actually killing with one hit is not the same as feeling like being one hit killed.

There are enough situations where you get the impression of being OHKed simply because it happens so fast or lag is involved or both. High ROF weapons to the head in CQC will drop you faster then you can react (or your client even receives the "you got owned data pack" due to ping). Also the shotgun/knife combo can be perceived as OHK.

Tried often enough to "headshot" with the knife. Never worked but instead it pretty much does no damage in 4/10 case at the second hit. I gave up on purely kniving people, its not reliable.

Also a lot of perceived and actual OHKs are due to explosions. Flak armor is worth every Cert you put in it. Rank 2 costs only 11certs i think, and makes lets your survive a lot of those situations. Be it mines, HE tank shells or lolpods.

Does a lolpod headshot OHK? I usually dont get that on the first rocket

I think we forgot the HE shells on non direct hit.

the Fury does OHK on body hit.
not on test server though ueheuhe

Technically all shotguns do not count since they do not kill in one hit you know. They need to hit multiple pellets.

you forgot noob tube launcher