The Shoulder Ripper is my favourite way to counter the most common defence to the armbar.
The beautiful thing about this technique is it requires very little grip adjustments so you stay locked in the arm bar position, yet it’s still a very high percentage way to break your opponent grip.
Check it out in this video:
I call it the shoulder ripper because I literally ripped someone’s shoulder from their pec using the technique. So please BE CAREFUL and protect your training partners when using this technique.