Since Arma 2 AT launchers reproduced in game aren't disposable like in real life, and in Arma 3 Alpha, NLAW still not. I've reported this "bug" on BIS forums in this topic: http://forums.bistudio.com/showthread.php?148134-Disposable-ATs&p=2318533#post2318533
I believe this might be a minor issue compared to many others you're facing now, but I don't belive that BIS can't do a better job than ACE developers did about this question.