Sir: You hit a soft spot with me! My very first centerfire rifle was a 1942 Remington M1903A3. If only that rifle were still mine!! Yes sir, I agree with TribReady; find some replacement parts, clean it up, re-Parkerize it if you like. Since it has little collector value, it is certainly worth considering restoring it to pristine issue condition. Then sling it, load a stripper clip of ball ammo, and go for the x-ring. You'd be surprised what your eyes can do with that aperture rear sight!