The AR 15 is the LEAST powerful gun in America's arsenal unless you count the Beretta 98. The shame is that because it looks scary people think it is some bada$$ weapon of mass destruction. Let me let you in on a little inside knowledge people. the 5.56 nato is designed NOT TO KILL. That's right military weapons are not designed to kill they are designed to wound. A wounded soldier is a far greater burden to his homeland than a dead one. The thought was it would stop all wars. This is why you never let Psy-ops run policy.
I did 4 in the Corps. I know the M-16 / Armalite Rifle 15....POS. I hated my Matel rifle.