I've had a 2x Leupold on my Desert Eagle .50AE for 18 years, and it's endured well over 1,000 rounds (and at least 2 accidental hard drops) with no issues, until hunting season. I noticed the reticle shifted slightly when I was checking zero, and when I got around to messing around with it after hunting season the reticle took on a 45 degree cant. I sent it in to Leupold along with another 2.5-8 EER that I bought used from someone and the magnification ring was locked up on it. I received a brand new replacement for the 2.5-8 within a week and after 2 weeks they sent back my 2x completely rebuilt with the newer adjustments as well as a new rear lens (the old one had several scratches that cleaning wouldn't remove). I definitely give my thanks to Leupold for honoring a warranty on a scope I didn't buy new, and completely rebuilding what was a $200 scope when I bought it nearly 20 years ago!