Meet 5.7 NATO

Designed in the late 1980s for use in Personal Defense Weapons, or PDWs, the 5.7×28 round was first marketed by FN in the early 1990s in its P90 PDW/P90S carbine and Five-seveN pistol. Since then, those guns have been adopted with military and police forces in more than 40 countries as well as sold extensively on the commercial market.

Now, some three decades after it was introduced, the Western defense alliance recognized the caliber under standardization agreement (STANAG) 4509, which integrates it into the AEP-97– NATO’s Multi-Caliber Manual Of Proof and Inspection.

More in my column at Guns.com.

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