Anthony.....I saw the same article with the Heinie slant pro on the Defender. The article said that the sight fit right into the new cut on the Colt slide. The Slant pro is supposed to fit the same slide cut as the original Heinie sight so they should fit the Defender as a drop in part. Mac I don't think it was Heinie changing his dovetail for the new Colts, it appears that they just got smart and used the same cut required to mount a Heinie sight. Good thing too because the new style Colt sights that come on those guns are Butt Ugly! Chris in MO
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