Hi varmint controller, the front blade is a williams 1/16" gold bead, .538". the ramp is marbles dovetail front ramp, .225 high. The marbles is for a larger screw so I filled in the hole with jb weld and redrilled for the original h+r front sight screw and a little loctite. For a .44 I think you would use a shorter front blade or combination of ramp and blade. It took me a few trys before I got the combo I like. Also tried a red firesight but was no good for me, always a bit fuzzy, the brass bead is plenty bright enough.