Tried a search but got little info. I saw these at Brownells and they looked like a nice sight I could install at home, something I liked. They include Trijicon lites - pretty low profile as well. Was also looking at Truglo TFO but there are more than a few problems reported and installation looks a little more difficult. These will be going onto a new G20SF. Any other suggestions would be appreciated. Wanna kill these ads? We can help!