I have the same model you have. I just sent my slide to Novaks to have their adjustable rear sight installed. The Novak adjustable rear sits a little higher than the factory fixed so a taller front sight has to be installed. I had them install one of their red fiber optic front sights. Check out Novak on the web for pricing and instructions. They are great to deal with and it took less than 2 weeks including shipping to get my slide back.

__________________
John