The half guard lockdown position in BJJ is a strong option to turn what can be overlooked as a transition position into a brutal attack position. With the half guard lockdown, your feet wrap around your opponent’s leg at the shin and prevent them from passing your guard while also limiting their movement so they are unable to prevent your attacks. (check out our writeup on How To Do the Halfguard Lockdown in BJJ here).
The arm triangle choke is a simple yet effective choke that involves wrapping your opponent up and pitting the geometry and strength of both of your arms against the strength of one of their arms (just like the halfguard lockdown).
Start: Half guard bottom with lockdown, opponent has an arm under your head to control your movement
Step 1: Wrap your arm on opposite side of opponent’s controlling arm around opponent’s head
Step 2: Gable grip your hands together
Step 3: Figure four arms with your wrapped hand in the elbow of free arm
Step 4: Grip opponent’s forehead with free hand
Step 5: Squeeze
Finish: Submission via arm triangle from halfguard lockdown