Mueller Quick Shot
I purchased my Quick shot back in 2012 and topped in on Mossberg 535. After several years of abuse shooting 3 1/2's it would no longer hold zero. After reading Mueller's warranty disclaimer about the original receipt required for repair I figured I had gotten my money's worth already. I gave them a call anyway and was surprised when they told me Optics Planet probably still had a copy, sure enough, after a few mins chatting I had a copy of my original receipt.
Then I noticed the fine print stating 3 years against manufacturer’s defects. So again I called Mueller support knowing I'm outside of 3 years. I was told to send it anyway.
Received a email stating the lens came lose and new replacement scope had shipped.
Pretty strong customer service in my opinion.
I've yet to kill a battery, but always have a spare in vest