Lack of a permanenetly lit reticle - so its use in some lighting environements was tough - no to mention very hard to use while moving -- and the 8hr battery life was ASS.
Very poor field of view and with that FOV went a large scope that took up a lot of your FOV outside the sight.
Poor mounting system, poor range adjustment and poor reticle.
USASOC explained what they wanted and Leupold decided they knew better -- then where unwilling to chnage it into something useful as a Cbt optic.