In order for it to function as it was designed yes. If you shoot at one range,you can probably just get a taller front sight. The calibration will be off....LarryDoes the GF Diopter sight require a "cut" to be milled into the top of the receiver for the sight to fit onto the gun?
Depending on your hole spacing,there are other options. I recently put a Solderin rear and an Elite front sight on my 1902. Weather has been bad here and I have not made it to the range,but I gotta tell you,when I look down those aperture sights with a 36" sight radius, it's tough to imagine missing anything LOL...LarryThanks Fellows. I think I'll leave my D&T 1943 Husqavana (sp) as is..... without a diopter.