Of course this is personal preference so your list will be very different to mine, it's just how us humans work! Now for some explanations
Clean – don't need optics at all and can use the iron sights on any maps without trouble
Might need an optic – Can use the iron sights comfortably but on some maps and situations a red dot will be needed (especially on maps with lots of head glitches)
Optics required – self explanatory
WHAT AM I LOOKING AT – never have been a fan of the peacekeepers iron sights at all no matter the iteration. I'm mostly memeing here and it'll obviously go to optics required
P.S yes I know about the iron sights on the DSR but this is an MP only list and the launchers don't count because well they're launchers and you can't put any reticles on them and the reason why the M8a1, swat, smr and fal are on there is that those weapons require accuracy to be good so a red dot is a must as it cleans up any possible obstructions