I recently moved the rest of my stuff out of my dad's house - finally all of my things are with me here where I go to school. In the move, the front 30mm ring for my CZ550 went missing. Turned the apartment upside down - nada I called up Warne to see about replacing it (I offered to pay for a new one, or maybe send in the rear ring for a possible discount on a new set). However, the man at Warne would have none of it. He sent me a brand new set of rings at no cost, he wouldn't even let me pay shipping On top of that, I have found Warne rings to be totally rock solid. I own a few sets of their "permanent" rings for some CZ rifles, and although mounting them is a little tricky they are bombproof. Just wanted to share a positive experience!