Bought a Mueller scope in 2003, Sport Dot, 3-9X40, used it on my 22-250 for coyotes. Noticed that at the bell end it was looking like there was some moisture and grainy areas around the outside of the glass. Tried cleaning, thought it was on the outside, no dice. Called Mueller, spoke to Rich, stated it was probably a nitrogen leak, advised me to send it in. Got a package from them yesterday, they didn't even bother to fix it........they just sent me a new one! Hats off to Mueller, and the only thing it cost me was to ship it out........
John
John