"It was determined that volume of fire was more important than aimed shots and that our military would be better served by infantry weapons with low recoil, firing smaller-caliber, higher-velocity projectiles. "
A cardinal mistake: high volumes of fire don't kill the enemy in close combat. Aiming does.
It seems that you are claiming that the m16 is inaccurate. I’ve heard a lot of people make some pretty absurd claims about the m16 before but I’ve never heard that.