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Colvin · September 2, 2012, 08:50 PM

So my understanding has always been that one can fire a .223 round out of a 5.56 chambered AR-15, but you can't fire a 5.56 out of a .223 (at least, not a great idea). However, a seemingly knowledgable man told me that you can't fire .223 out of a 5.56 gun either.

Any merit to this? Thanks.

September 2, 2012, 08:50 PM	#1
Colvin Senior Member Join Date: August 15, 2011 Posts: 127	5.56 and .223 So my understanding has always been that one can fire a .223 round out of a 5.56 chambered AR-15, but you can't fire a 5.56 out of a .223 (at least, not a great idea). However, a seemingly knowledgable man told me that you can't fire .223 out of a 5.56 gun either. Any merit to this? Thanks.