I'm not trying to defend Leupold here, but how did you establish that they have a high failure rate? If I look back through our data of 10s of thousands of completed projects, we are seeing comparable failure rates of the Leupold Mk5 and the Nightforce NXS. Statistically, I see no difference. However, from personal anecdotal experience, I've had to failures on hunts with NF NXS scopes. I've used the NXS on hundreds of trips, with only a dozen under my belt with Mk5 so I realize that the anecdotal data is meaningless.