Stopping power of the AR platform
I am looking for a military style rifle to complete my small arms collection. I was looking for an AR style rifle, but have read many horror stories in recent weeks of how underpowered the 5.56mm/223 round it. One of the worst concerned a Marine detachment in Iraq having to shoot a BG 10 times COM to incapacitate him.
My question then is this, how reliable a man-stopper is the 5.56mm round at distances less than 100 yards? What kind of ammo do you recommend for SD/HD situations? I have years of experience with pistols and shotguns, but my experience with rifles is limited. I would sincerely appreciate it if anyone could help me out on this one.