My ER-25 5-25x58mm that I'd gotten a while back, it's back for it's second trip to the factory for warranty work. Right out of the box the objective lens was catty wompus just enough for me to notice and so it went back. They handled that nicely and I got a free ARD out of it. This time, I get the thing to the range and find out that it's not reliably pulling adjustments out after they're put in, especially near the limits of travel and it's doing it on windage and elevation. Basically I could zero it and hold off using the reticle but no adjusting turrets or my zero would be b0rk. So, back it goes. They think my rings might be at fault but I'm really certain that's not the case. It did that before when I sent it in the first time before it was ever mounted in rings and I guess they just didn't fix that bit and I didn't notice till I started dialing DOPE. So it's back in their fix-it shop. They'll repair it or replace it. Fine. It's still a USO even if the quality control guy on this one was asleep and it's taken so far twice for them to get on with making it right. They're downright friendly and helpful about it.