How Can I Determine If Chamber Is 5.56 Or .223 [Archive]

Tag » How To Tell 223 From 556 Barrel

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• How Can I Tell If My Sons Barrel Is .223 Or 5.56 [Archive] - CMP Forums

• 223 Vs 5.56: Which One You Should Shoot In Your AR-15?

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• Gun Marked/Stamped 223 And 5.56? [Archive]

• How Can I Tell If My Bore/barrel Is 5.56 Or .223?

• 5.56 Vs. .223: Which Can I Shoot? - The Armory Life

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• .223 Wylde Chamber - Wikipedia