I picked up 2 very slightly used FM scopes over the last couple of weeks because I wanted to switch to FFP. I have heard some say the reticle on FM blocks to much of the target. I had hesitated switching because of this but i have found just the opposit it works great when using 1" red dots for targets. I have also been impressed with the glass. I use mainly mid to high end Burris or Pentax and have used leupolds and Ziese but never liked the glass or maybe it is the coatings they use. (I know I'm going to get flamed) Now I guess I will probably look for a higher end FFP. But for now I'm going to get use to ranging FFP and see how the FM's hold up. How are the IOR's I'm not looking at NF or USO because I don't want to sell a kid and I have 1 in college