The Rear Naked Arm Crush is another weapon you can add to your arsenal of back attacks.
In this short video put out by KYFA Klinic they go over how to get an arm crush from the back when you have one arm controlled but you cannot sink in the other arm for the choke. This arm crush gives you another option to attack your opponent without giving up the position.
Unlike the RNC where one arm is chopping his head off outward, once you have the RNC locked in on the arm you want to squeeze both arms in to your chest as you take a deep breath in to get the tap. The squeeze is a little different than doing the choke even though the grip is the same.
