I will only add this to Mackay's summary. You'll be dealing with a ruthless MFer who will not hesitate and despite your anguish, he will keep beating/shooting/twisting the knife in you until you are a gurgling puddle of goo.

You must be just as ruthless. Don't hesitate to respond with overwhelming force and don't stop until he's down and out.

This is primarily a software problem, but the hardware has to be up to the job. Don't choose hardware that will work if everything goes right. Choose hardware that will work when everything goes wrong.

Direct Impingement is the Fart Joke of military rifle operating systems. ⓒ