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View Full Version : Bonehead question re: 5.56mm vs .223

sig22018
10-03-2007, 09:20 PM
The civilian AR15 is chamberd for the 223 yet the military uses 5.56. What is the difference between the two rounds? I see them both on shelves in stores. A friend asked me and I did not have an answer. Which should I use in my AR that I am building?
Mr. Beretta
10-04-2007, 08:50 PM
Ted beat me to it.

Bookmark that link.

Best info I've ever found on the issue! :)
sig22018
10-06-2007, 07:50 PM
THANK YOU! That link answered my questions and alerted me to issues I did not know about. Thanks a million guys.