Leg LockAnkle submissionBelt: white+Risk: moderateIBJJFADCCNo-GiSub-OnlyMMA
The Achilles Lock, or Straight Footlock, is a fundamental ankle submission applied from single leg X or outside ashi garami. It targets the Achilles tendon and ankle joint via a tight, levered grip and hip extension, making it a fast and effective submission in both gi and no-gi competition.
Start
Single leg X / outside ashi
End
Submission
Prerequisites: Single leg X entry · Breaking opponent's posture · Basic ashi garami retention
Steps
1
Establish Single Leg X (Outside Ashi)
From open guard, insert your inside leg deep between their legs, hooking your foot behind their far knee. Place your outside foot on their hip, toes flared out for control, and clamp your knees tight to isolate their leg.
2
Secure the Achilles Grip
Reach your same-side arm around their ankle, placing the blade of your forearm directly against their Achilles tendon. Grip your own wrist with a figure-four (guillotine-style) grip, keeping your elbow tight to your ribs.
3
Position Your Hips and Shoulders
Scoot your hips slightly away from their trapped leg to create tension, keeping your outside foot active on their hip. Your shoulders should be square and slightly back, not rolled forward.
4
Lock the Submission Angle
Angle your body so your forearm is perpendicular to their ankle joint, and your chest is facing their foot. Your forearm should be low, almost at their heel, not high on the calf.
5
Apply Downward Pressure
Flex your wrist to curl the blade of your forearm into their Achilles, and simultaneously pull their toes towards your armpit. Keep your grip tight and wrists straight.
6
Bridge and Extend
Drive your hips forward and arch your back, using your outside foot on their hip for leverage. Maintain knee pinch and pull their foot up as you bridge, increasing pressure on the ankle and Achilles.
7
Finish and Monitor Escape
Continue to bridge and pull until you feel a tight lock or your opponent taps. Be ready to adjust your foot position or re-clamp your knees if they attempt to rotate or kick free.
Key details most people miss
The forearm must be placed as low as possible on the Achilles, almost touching the heel, to maximize pressure and minimize slipping.
Keep your outside foot actively pushing on their hip; a lazy foot allows them to close distance and relieve pressure.
Your figure-four grip should be tight, with the choking arm's elbow glued to your ribs to prevent wrist fatigue and grip breaks.
Angle your body slightly off-center (not directly in front of their knee) to reduce their ability to counter with a straight footlock of their own.
Common mistakes
If your forearm is too high on their calf, the submission loses leverage and becomes a pain compliance hold instead of a true joint lock.
Allowing your knees to open gives them space to rotate and slip their foot out.
Failing to keep your outside foot on their hip lets them pressure forward and stack, neutralizing your attack.
Gripping with a loose or bent wrist reduces pressure and risks wrist injury under resistance.
Counters & responses
They try: Opponent rotates their knee outward to slip the heel.
You do: Pinch your knees tighter and adjust your hip angle to follow their rotation, keeping their toes trapped under your armpit.
They try: Opponent stands and stacks forward, pressuring your guard.
You do: Extend your outside foot strongly into their hip and scoot your hips back to maintain distance and leverage.
They try: Opponent attacks a counter footlock on your exposed leg.
You do: Angle your hips off to the side and keep your free leg hidden behind their far leg or actively posting on their hip.
They try: Opponent peels your top hand off the figure-four grip.
You do: Switch to a palm-to-palm (gable) grip temporarily and re-fight for wrist control, keeping your elbow tight.
Drill prescription
6 rounds × 2 minutes; 50% resistance; alternate roles each round; goal: 5 clean, controlled taps per round with no knee reaping or stacking allowed.
How the masters teach it
Dean Lister
Emphasizes deep ashi entries and finishing mechanics that maximize leverage on the Achilles tendon.
Bernardo Faria BJJ Fanatics
Mikey Musumeci
Known for precise grip placement and IBJJF-legal straight ankle locks with high finishing percentage.