Be aware that the 55 grain 5.56 mm full metal jacket rounds the M-16s fire are very high velocity and tend to ricochet (off walls, bones, and other hard surfaces ) a lot. I think the M-16s these days fire 2-3 round bursts instead full automatic. That'd cause more casualties than the slow 9mm rounds the Berattas (or the typical sub machine guns such as the Heckler & Kochs).