My M&P 15 OA is called a "Sport" in some literature. Also advertised as such at the Cabelas where I bought it 3 years ago. It's mechanically identical to the M&P 15's used by my local and state police. There is a WVSP M&P 15 Commemorative in my museum collection now, and after having stripped and cleaned it, I know it's the same rifle. All I know otherwise is mine is very accurate with Federal Eagle 55-grain. And I know what local city and state armorers have said to me.

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Heavily armed old man.