I have the 7/32 on my SRH 44 mag and the 9/32 on my GP100. I tried the Williams Fire Sight but like these a whole lot more. I am using the Williams fiber optic front sight with the one ragged hole rear sight. I purchased mine from Warren Custom Outdoors also. This is as close to a red dot as you can get without actually having one. I had a red dot installed but removed it. Enjoy, they're great!