Just put a heinie rear on my 5in .45 that had Novaks on it, BIG difference for me. Took some judicious filing but it went in OK, and provides a better sight picture for me, like my Bomars. Brownells has them, the "lo-mount". Enjoy, DougC
Heinie makes the SlantPro in versions to fit the Novak slide cut, the Kimber slide cut, the Colt "Defender"/XS slide cut, and one to fit the original Heinie proprietary slide cut. None of these interchange.