AR-15 .223 vs Mil-Spec 5.56mm Chambers

The ShieldWall Network

By Jerry Kraus

The Shooter’s Log

What is the biggest difference between AR-15 .223 and Mil-Spec 5.56mm chambers? Most people do not know; they say, “I think you can shoot both kinds of ammo through either one, right?”

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Author: Alfred E. Neuman

71 year old geek, ultra-conservative patriot.