Awesome sight - Trijicon MRO 1x25mm 2 MOA Adjustable Green Dot Sight

Trijicon is an A Number One provider of optics. This product is an awesome example. I thought I had a defective product (even though the sight seemed to work perfectly) as the front lens appeared to be cross-threaded and skewed off center. An email to Trijicon was answered within hours and the explanation was given that the appearance of the front optic was correct! Here's the FAQ answer to it:
Like competitive optics, the image viewed through the Trijicon MRO becomes shifted somewhat at the edges of the field of view. This shift is a result of the design needing to have a tilted and curved objective lens to reflect the reticle dot back to the operator's eye. The image shift at the edges of the MRO's viewable area will be more noticeable than on optics with smaller objective lenses simply because of the larger viewable area. This was a trade-off in the design of the MRO in order to allow operators to see more area through the optic and thereby get faster hits on target from non-standard shooting positions.

This image shift does not affect the usability or performance of the optic when properly zeroed because the reticle dot and target will still be correctly aligned.
Thanks, Trijicon!