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Mir Lock (Reverse Kimura)

SubmissionNo-gi shoulder lockBelt: blue+Risk: moderateADCCNo-GiSub-OnlyMMA

The Mir Lock, also known as the Reverse Kimura, is a shoulder lock utilizing a reverse kimura grip configuration. This submission can be applied from both top and bottom positions and is notable for its strong rotational force on the shoulder, making it highly effective in no-gi and MMA contexts.

Start
Bottom or top position with reverse Kimura grip
End
Submission
Prerequisites: Kimura grip mechanics · Hip escape · Wrist control · Shoulder pinch finish · Breaking opponent's posture

Steps

  1. 1
    Establish Reverse Kimura Grip
    From guard or top, use your far-side hand to reach across and grip the opponent’s far wrist with a thumbless C-grip. Your near-side hand threads under their arm and grabs your own wrist, forming a reverse kimura grip.
  2. 2
    Pin Opponent’s Arm to Their Body
    Pull their wrist tight to their torso using your C-grip, while your other hand reinforces by pulling your own wrist. Keep your elbows close to your ribs to maximize control.
  3. 3
    Angle Your Hips for Leverage
    If from guard, shrimp your hips out at a 45° angle away from the trapped arm, planting your far foot on the mat for base. From top, step your knee up next to their shoulder for isolation.
  4. 4
    Trap Their Upper Arm
    Pin their upper arm to the mat or your body using your chest or thigh, depending on your position. This prevents shoulder rotation and escapes.
  5. 5
    Apply Rotational Pressure
    Rotate their wrist toward their head while keeping their elbow pinned. Use your whole body, not just your arms, to generate torque by rotating your torso and hips.
  6. 6
    Adjust for Tightness
    If their shoulder is flexible, walk your grip higher on their wrist and readjust your body angle to increase the leverage before finishing.
  7. 7
    Finish the Submission
    Continue rotating and lifting their wrist while pinning their elbow, watching for the tap. Maintain chest pressure and keep your grips tight throughout the finish.

Key details most people miss

  • The reverse kimura grip must be deep, with your wrist close to theirs and elbows tight to your body to prevent them slipping out.
  • Isolating their upper arm with your chest or thigh is crucial—if their shoulder can rotate freely, the lock loses power.
  • Generating torque with your hips and torso, rather than just pulling with your arms, dramatically increases finishing power.
  • Shrimping or stepping out to a 45° angle amplifies the rotational force and reduces their ability to posture up or roll out.

Common mistakes

  • Failing to keep elbows tight allows the opponent to slip their arm free or counter with their own kimura.
  • Applying the lock with only arm strength results in weak pressure and easy defense.
  • Not pinning the upper arm lets the opponent rotate their shoulder, nullifying the submission threat.
  • Letting your grip slide up their forearm reduces leverage and makes the finish much harder.

Counters & responses

They try: Opponent straightens their arm to slip out
You do: Maintain elbow pinch and adjust your grip closer to their wrist to keep their arm bent.
They try: Opponent rolls toward you to relieve pressure
You do: Follow their roll by maintaining the grip and transitioning to a back take or armbar.
They try: Opponent grabs their own shorts or belt
You do: Use your legs to pry their grip open or switch to a straight armbar by extending their arm.
They try: Opponent postures up explosively
You do: Angle your hips out further and use your chest or thigh to block their shoulder, breaking their posture.

Drill prescription

5 rounds × 3 minutes, alternating top/bottom; 50% resistance; goal: 4 clean Mir Lock finishes per round with full control and no grip breaks.

How the masters teach it

Videos are still being curated for this technique. AI suggests these instructors:
Frank Mir — Popularized in MMA with a powerful finishing angle from top half guard, emphasizing shoulder isolation.Dean Lister — Utilizes the reverse kimura grip from bottom and top, focusing on leverage and transitions to leg attacks.Craig Jones — Integrates the reverse kimura into modern no-gi systems, often using it to enter back takes or leg entanglements.John Danaher — Emphasizes grip structure and positional control, linking the Mir Lock to broader kimura trap systems.
#shoulder-lock#no-gi#submission#reverse-kimura#top-and-bottom#mma-legal#adcc-legal#medium-risk#flexibility-dependent#kimura-system