@Marcel2015 Thanks a lot dude, that worked for me!
The files that I had to work with are actually in update.rpf not common.rpf (common.rpf files are exactly the same as in the mod directory). Here is exactly what I've done:
COPY <root>\update\update.rpf\common\data\ai\weapons.meta TO <root>\mods\update\update.rpf\common\data\ai\weapons.meta
and
COPY <root>\update\update.rpf\common\data\handling.meta TO <root>\mods\update\update.rpf\common\data\handling.meta

And now I can complete missions with high % accuracy even with Redux installed!