Armlock Off Bicep Post

B is in my guard and is posting out on my armpits

Step 1: My right arm goes to the same side arm and I place my hand on B's elbow. (Rest of arm lays flat against the arm)
Step 2: I put my right foot on B's hip and shrimp out

Step 3: B's arm should be trapped on the side of my body. From here my knee comes up to the back of my hand and pushes down

Step 4: My left leg comes up and clamps down on B's chest

Step 5: I have the option to slide my right shin to the back of B's head for the belly down armbar