Is 12.5" the Ideal Barrel Length for your AR Build?

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BCM Standard 12.5″ Upper Receiver Group with Daniel Defense Lite III(DDM4) 9″ Handguard has a new feature up on their website praising the 12.5″ barrel length for the AR-15. The article and corresponding video make a case for the 12.5″ rifle with a carbine length gas system in 5.56 based on a few key…

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