I love this idea.
I don't get it when you argue about this not being good idea due to teamwork.
It is like that in real life too, you screw up by missing your shots -> you are pretty much dead.

This should also be implemented with chambering weapons so your character would actually take your weapon and one round to your hands and chamber it.
At the moment in Dayz everything in combat is done too quickly.

I've lost 3 items to this.
It's reproduced by being crouch, having item on hands (maybe in combat mode don't remember) and trying to lean (each time to the right, might happen with left lean too).
It doesn't happen every time / with all items.
But with weapons it seems to happen atleast for me.