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Marty D. asked 7 years ago:
Yes Marty, it is an 'either / or' situation .. Use either 5.56 or .223. This one will safely fire both.
Rick C.
7 years ago
Marty, the barrel is stamped 5.56NATO so it is good to go with both 5.56 & .223 ammunition.
James G.
7 years ago
