I bought the new mcarbo notch rear sight. I like it. It is taller, but now I need a taller front sight to go with it. There is not enough adjustment using the factory post with the notched mcarbo sight. I am shooting inches high and the front is screwed out as far as it can go without falling apart. There may be enough adjustment for the new taller mcarbo peep sight. I think that the notch one may be taller than the peep one.