Difference among faction snipers

[Duskguy]

there will be hit boxes, and so there will be headshots...and i believe all the rifles are 1hk head shots. was i under the wrong impression?

i ask because when i am not a "vehicle whore" as BF3 people (xbox) seem to call me, i like to often sit back and snipe. the TR rifle seems my play style in that it has little bullet drop (m98b in BF3), but doesnt ihk in the chest...which i can deal with. but i was under the assumption that headshots would 1hk anything but heavy assault and max classes.

if not, im sure there will be certs i could put towards this, so its not a big deal if i was wrong