No list of top rifle scope manufacturers is complete without the American legend that is Leupold. They began as a survey company in the early 1900s, but in the 1950s the company burst upon the scene with one of the first nitrogen sealed rifle scopes meant to battle scope fog up. As the years have passed, Leupold has been a continued leader in the rifle scope market by pioneering the duplex reticle and advancing many different areas of rifle scope technology. Today the company is even one of the biggest providers of rifle scopes for the US military. Leupold is known for their American craftsmanship (headquartered in Beaverton, OR) and their Golden Ring guarantee. They guarantee that every product they produce with a golden ring on the optic is protected from defects in materials or workmanship. There is no time limit and it doesn’t matter if you’re the original owner or not, and there are no warranty cards to worry about. Leupold is always worth a look for rifle scope shoppers.