5.56 NATO vs. .223 Rem.: What's the Difference?

Many popular AR-15 rifles on the market are chambered in 5.56 NATO or .223 Rem. Externally, both rounds look exactly the same, but there are some critical differences between the two.

Latest Stories

Mossberg 500 and 590 shotguns

Must-See Video


Get the best of Shooting Illustrated delivered to your inbox.