"Finding thy tactics are not sound?" D'Artagnan didn't drop his density all the way down when he noticed some switched back to their guns. He pushed it back up a bit when the guns were raised in his direction. He kept his arms (and thus his wrists) in motion, making their targets harder to hit. He rushed toward one of the shooters on the end.

It kept the rest of the men in the periphery of his vision so he could try to deflect any knives thrown.