Butterfly Arm Drag Sweep
Butterfly arm drag — arm drag clears the near arm, exposing the back or creating a single leg angle. Back take or sweep.
Adapted from InGrappling, Butterfly Arm Drag Sweep. System Games did not invent this curriculum.
Manage injuries →Position map Connects to 2 positions across 2 relationshipsOpen in the map →12←Enters from
The butterfly arm drag sweep uses an arm drag to remove the top player’s near arm from its base position, rotate them sideways, and then use the butterfly hook on the drag side to sweep — or to create the angle for a back take when the sweep is defended.
The arm drag itself is a two-hand technique: the bottom player’s same-side hand grabs the top player’s near wrist and pulls it inward toward the centreline, while the other arm comes over and hooks behind the top player’s triceps on that same arm, completing the drag by pulling the arm across the top player’s body. This clears the arm and rotates the top player’s shoulder toward the mat — their back is now exposed and their near arm is no longer available as a posting tool.
What separates this from a standing arm drag is the butterfly hook. Once the arm drag has created the angle and the rotation, the hook on the drag side drives upward to amplify the off-balance and either complete a lateral sweep or open the space for the bottom player to rise and take the back. The hook and the drag create a two-vector attack that the top player must respond to simultaneously.
The exit from this sweep is not a single fixed point. Taking the single leg, taking the back, and landing in top side control are all viable outcomes — the exit depends on how the top player responds to the drag. A top player who defends the single leg will expose their back; a top player who tries to reestablish their base will give the single leg. The bottom player reads the response and follows the path that opens.
INV-G04Invariant "Destabilising the top player to their hands removes their ability to pass and creates submission opportunities. Forcing a hand post is the transition from defensive guard to offensive guard."
Why it works hereThe arm drag inverts the standard hand-post mechanism — instead of forcing a post, it removes the arm already serving as the top player's near base. Once that arm is dragged across the centreline, the top player has lost a primary support on the drag side and must replace it with a knee or a hand somewhere they did not choose. That forced re-base is the offensive moment the bottom player attacks with the hook elevation and the back take.
See full invariant page → The arm drag is a direct application of hand posts create offence — but in the opposite direction from the standard hand-post scenario. Rather than forcing the top player to post, the arm drag removes the arm that is already posted. By clearing the near arm, the bottom player removes the top player’s primary base support on the drag side. The resulting instability is the precondition for both the sweep and the back take.