Primarily used in tandem with the wider Trijicon HD front sights, the rear sights feature .170" wide U notches and fit slides machined for the Novak LoMount style .500 x 65 degree cut.
Three heights are available - .325" (HD-004-WU), .350" (HD-004.5-WU) & .375" (HD-005-WU) to fit all applications!
Night Sight versions are available in all three heights in the popular 3-Dot pattern. Just add "-T2" tp the end of the part number
The HD-004-WU (.325") is the height of the original Novak LoMount sight, used primarily on Government Models and Commanders.
The HD-005-WU (.375") is the height of the "Tall" Novak LoMount used on the shorter 1911s, like the Officers ACP, Defender, Ultra Carry, etc.
The HD-004.5-WU (.350") is the height of some new models like Springfield's EMP-4 and Elite Models. It's also a great problem solving tool for Gunsmiths working to get the perfect height sight set on a 1911 without having to go too short or too tall. My favorite for Commanders!