Another instance of him having access to the appropriate equipment, but not utilizing it. We know he has access to RPGs, probably Carl Gustavs or maybe even a SMAW, which while not as potent as the others are can at least be much safer to fire indoors.
And, oh yeah, a mass of writhing enemies and he doesn't even bother breaking out the grenades like he did before (although obviously don't use the toxic ones in this case). And nothing like breaking out a Milkor. Why not?
Could our hero please stop being a fucking dolt of a miser that's more concerned with pennypinching than keeping his team alive? This asshole would even make Ebenezer Scrooge disgusted with his cheapskate mindset.