The Firing Line Forums - View Single Post - AR-15 bolt on M16 lower

Mike703 · February 7, 2013, 06:37 PM

Your uppers need to have a "sear relief cut" to work with the M16 auto sear.
Do a google search on "m16 sear relief photo" to see the difference between an AR15 uppper and a M16 upper. You'll also need a large pin to small pin adapter if you AR15 uppers use the large pivot pin.

February 7, 2013, 06:37 PM	#2
Mike703 Junior Member Join Date: December 21, 2006 Posts: 14	You'll need a M16 BCG to run full auto Your uppers need to have a "sear relief cut" to work with the M16 auto sear. Do a google search on "m16 sear relief photo" to see the difference between an AR15 uppper and a M16 upper. You'll also need a large pin to small pin adapter if you AR15 uppers use the large pivot pin.