I'm not so sure about this thing. It sounds great, but I know of guys who couldn't even think to operate the selector switch on the M-16, ( one guy even kept dropping and slamming in fresh clips even though he wasn't firing) in the heat of a firefight much less decide from 5 options on what to do with the grenade launcher. My point on this is it needs to be as brain-dead operable as possible under combat conditions otherwise its just wasted weight and equipment, and could actually get someone killed while they are distracted with their weapon. Your highest vulnerablility is when reloading, clearing a jam, or otherwise not paying attention to your surroundings.