I just put a Kensight adjustable rear sight on my Universal .30 Carbine ( I'm not calling it an M1 Carbine to avoid insulting the purists), and something's wrong. I eyeball centered the sight and had it in the 100-150yd notch and using normal military sight picture, at 25yds POI was 1ft high and 4in left. Adjusted windage and got 1ft high and centered. Using an opened up 50lb dog food bag as a back drop, it never registered a hit on the target or bag. This sight is supposed to be a USGI type replacement like the ones on the M1A2. Anyone have any experience with these sights? Is this normal? Should I be thinking in feet instead of yards like on the original non-adjustable M1 Carbine diopter sights? HELP!!!!!