Re: IOR MP8 - X1 Reticle
I just looked at the through the scope pictures on liberty optics. The X1 does indeed have the 1/2 mil marks, EXCEPT on the 1-10 eliminator. Don't know why the difference. If you look at the 3-18 FFP scope, you will see that they are there.
Not sure what you are asking about the standard MP8, yes, there are 1/2 mil marks and you get 4 1/2 then 5. The 5 is on the 5 mils line. The first short line from the dot is 1/2 mil, the longer line is 1 mil.
There is no down side to the new reticle, it depends on the model of scope you get.