We get countless emails every day about whether or not our various sights are compatible with the Trijicon HD and other brands. We go to great pains to include information on each of our product pages about what dimensions are required for compatibility with our front or rear sights. We obviously prefer that you use both our front and rear, but it is possible to pair our sights with other brands if you take the effort to determine if the dimensions are compatible. It is not possible for us to stay current on the dimensions that other manufacturers use on their products, so we suggest that you contact them for their sight dimensions if you are looking to mix and match different brand front and rear sights.