Some redfield scopes have lifetime warranties. I think Meade (blount) owns redifeld now but you should check to see if they will fix it for free. I had an older bushnell banner (made in japan) that malfuntioned. Since the parts were not available, bushnell replaced it with a new one. It is a much better scope and all I paid was shipping to get me old one back to them
Worth a shot
okcmco