I own two of them. One is on my 3-1/2 inch turkey gun. The other is on my S&W Stealth Hunter(44 mag). One is about 5 years old, and the other is 3 years old. They both work great. They are not built by Leupold, and I believe they do not carry the Leupold life time warranty? Leupold is also importing some of their new binoculars also. Tom.