The Firing Line Forums - View Single Post - Interchangeability of the AR-15

johnwilliamson062 · January 18, 2013, 11:58 PM

Is there a reason ou can't make an AR-10 upper in 556? Seems like there shouldn't be a problem beyond a specialized mag or mag well. Too heavy of a bolt for the 556 to cycle correctly?

January 18, 2013, 11:58 PM	#11
johnwilliamson062 Junior member Join Date: May 16, 2008 Posts: 9,995	Is there a reason ou can't make an AR-10 upper in 556? Seems like there shouldn't be a problem beyond a specialized mag or mag well. Too heavy of a bolt for the 556 to cycle correctly?