1. It weighs too much.
2. I requires batteries to fire.
3. There are no iron sights to back up the electronic scope.
Don't get me wrong. I am all in favor of progress in arms.
My problem with this thing is mostly that it needs batteries and has no iron sights for backup.
Weight is also an important consideration.
A true soldiers friend must work in mud, rain, dropped, drop-kicked, p!ssed on, frozen at -40 degrees, buried in dirt for a month, and so on.