Originally Posted by
26 Inf
What type of armor? You bang somebody with two rounds of .223/5.56 center mass and even if it doesn't penetrate, it is going to slow them down enough for you to face shoot them. In fact it would probably stagger them more than shoots to the chest that penetrated. Think of it this way - close range, if the vest stopped the round it dissipated ALL that round's energy in the vest material and whatever is up against the back face of the vest - your chest.
Officers, for the most part stay on their feet after taking pistol hits to the vest, but the ftlbs of energy imparted is vastly different, and the way a kevlar vest dissipates energy is different than the way a ceramic or steel plate vest dissipates energy.
In a pistol, 124gr Federal HST has about 360ftlbs of energy at the muzzle. Both Hornady 60gr TAP Urban, or 62gr Tap Barrier have over 900 foot pounds of energy at the muzzle. Hammer somebody with two of those and they are staggering if not going down.
I have my SD mags loaded with 60gr Urban. I would not advocate trying to keep track of 'primary' 'backup 1' and 'backup 2' much less go through the rigamarole of changing out ammo when I enter different environments, i.e. home, street, vehicle.
Regarding your desire to build a 10.3 AR pistol for briefcase carry, the first thing I would say is that when trouble comes, it often comes fast and unexpected. Fate being what it is, you will probably be distracted by a cool car, an attractive female, or a squirrel, when danger grabs you by the throat.
Unless I had a sling pack, I would probably eschew the AR pistol. Why? Because unless my hand was already inside the bag/briefcase I can't see deploying the AR pistol quicker than I could a pistol from concealment. Additionally, I'm not going to want to shoot one-handed, so the briefcase in my hand is going bye-bye. I have several covert sling bags for my SBR with a folding stock, I feel pretty self-conscious carrying any of them slung, because I would key on them, so I also expect others to key on them. The first rule is to be and act natural, so I generally leave them in the vehicle.
What we all need is practice, practice, practice.
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