Tonight I tried installing a Heinie rear sight on my Colt XS Commander. I've installed a couple of dozen sights (Bomar, MMC, Colt, Novak, Baer, LPA, etc., etc.) including very tight Kimber sights. Anyway, I slide the sight into the dovetail and using a light plastic mallet I tapped on it with medium light force. The sight started lifting up so I gently tapped it out. When I got it out I couldn't believe how chewed up the dovetail was on the sight. It was almost as if the sight was made out of potmetal. I've never had this happen with another sight, even after pounding the hell out of it (which I did not do with the Heinie sight). Did I just get a bad sight or are Heinie sights made with especially soft metal?