[markiser]

I just bought a Ruger Mark III stainless with the 5 1/2" bull barrell. I love the pistol but am not liking the sights so much. Any have recommendations for some hi visibility replacement sights? I wouldn't be opposed to keeping the back sight if I can find a good replacement for the front. I have done a little searching and find 2 sight heights. I'm not sure which I have or what to measure to verify. Any help will be greatly appreciated.