Good morning. I have a HK USP .45 Compact, a Sig 239 .40, and a Baretta 92 9mm. I have not shot pistols for long and am still stiving to become more accurate. This weekend the club had an expert and I asked him to shoot the pistols. As I have experienced the HK shoots 5 inches low and 6 inches left at 25 yards, the Sig is also low and left but not quite as much, the Baretta is perfect. I called the shop where I purchased them and they said that HK and Sig can supply sights to replace mine. I looked at the WEB site for both and could find nothing except a price list that stated a figure of $80, but I'm not sure that I was looking at what I needed, $80 for a piece of plastic; please. I would appreciate a little advise or maybe someone has experienced the same thing. Thanks