FWIW, Just a data point on this scope and a failure, first I love the scope, mine is the kdot, but it went 100% tits up at a rifle match at the end of September. The rifle was an AR in .223 and it was mounted with a LaRue SPR. This was a 100 round tac rifle match run basically under USPSA rules in Central AL (Steel City club). Next to last stage, the optic became a complete blur and I had to point shoot my way through half of a stage, then it suddenly came back into focus for a few shots, then a blur again for the rest of the stage.
At the end of the stage I looked and it was clear again,