joraneyvanillaand aiming pretty much just consists of shooting feet.
I assume you don't play soldier.
As a matter of fact, I have ~200 more hours on soldier than you do. In case you haven't been around the community for very long, it's a joke that all soldiers do is shoot feet to get kills, I was being facetious. The point I was trying to make is that the differences in how well you can aim with stock vs. original is so minor in the end, it doesn't matter much which you use as long as you get used to using it.