If you are sure that you are not going to mount a scope you might consider taking the stock off and removing some material on the bottom of the mounting surface where the stock meets the action (adjust the angle of the stock so that the rear drops). I have a KRB7 and I use a scope so it is great for me but I know the problem you have as I noticed that the iron sights are almost impossible to get in line with the stock as it came. I will check mine again to see if what I mentioned is even possible. I think I read a comment from someone that did something like that.