Anti-personnel vertical maneuvering equipment

Anti-Personnel Three Dimension Maneuver Gear was created by the Central Military Police Anti-Human Suppression Squad specifically to combat the Survey Corps. The gear itself is an adaptation of the traditional 3D Maneuver Gear, allowing the operator the advantages of three-dimensional movement, but with the use of firearms instead of blades. It is virtually useless against Titans, but extremely effective against humans.

While the basic principles for maneuvering in it are the same, the design is drastically different: the main components of the gear is worn on the shoulders and upper back instead of the hips and the user uses the pistol-shaped grips which fire grappling hooks and high-powered projectiles.

Usage
The movement of the gear is very similar to that the 3D Maneuver Gear. The user just has to aim their grapple hooks at an object, fire them and activate the gas mechanism to reel onto that position. The user can also use their momentum to move not only in a rectilinear pattern but also doing other advanced maneuvers just like slaloming between objects.

Just like the 3D Maneuver Gear, it is less effective in open spaces where the wielder has almost no places where the hooks can be reeled. This fact added to the impossibility of killing Titans with the pistols makes the gear suitable for man-hunting and urban warfare. However it can be used in any place which has points to reel, like the crystal cave located under the Reiss Chapel.

Origin
It was developed by the Central Military Police Anti-Human Suppression Squad as a secret weapon to finish off the Survey Corps.

History
They were first used when the Special Operations Squad executed an operation to rescue Eren and Historia who were trapped in a hearse. Levi's squad was then attacked by surprise by a team of Military Police, the Anti-Human Supression Squad, that were using the new Anti-Personnel Gear inside the city.

After the Squad Levi escaped the attack, the Anti-Personnel 3D Maneuver Gear was used again in a cave under the Reiss chapel, keeping Eren and Historia away from the Special Operations Squad. The Special Operations Squad had to use complicated tricks, like explosives barrels and signal flares, as a way to protect themselves against the numerical superiority of the Central Military Police Anti-Human Supression Squad.

Mechanics
Body of the Device - While in the ordinary 3D Maneuver Gear the body is located on the hips, in this model it is located on the upper back. It is attached to the user's body with harnesses on the torso and arms. The hooks are stored inside the body of two axles that can shoot independently and are fired from the operating device located in the user's arms, not the hip.

Compressed Gas Cylinder- The Anti-Personnel 3D Maneuver Gear has, instead of two small tanks, one slightly wider cylinder is also strapped to the upper back. This is the part from where the propellant gas is expelled.

Operating Device - The operating device is used to control all the functions of the gear. It is attached at the hands and looks similar a gun's grip. It has the triggers and levers used to control the movement and the trigger that is used to shoot the guns, which are shot from this part of the gear. When it is unused, the operating device is holstered on the hips.

Guns - Instead of blades, the operating device allows the user to load single-use cartridges, allowing the user to fire a maximum of two at a time. The individual weapons can fire independently and can also be shot at great speed while the wielder is moving. Although they are virtually useless against Titans, these guns are very efficient against humans, even if they are armed with ordinary 3D Maneuver Gear. Every gun can shoot one single round with immense stopping power. This indicates that the rounds have an enormous caliber; these rounds can blow a human head like a watermelon. On the other hand, their penetrating power is limited as they can be blocked with something as simple as a corpse or with the blade of a sword made of Super Hardened Steel. When the rounds have been shot, the whole barrel has to be replaced. The users usually have extra barrels attached to their thighs.

Training
The actual training of the users is unknown, but it is believed that it is similar to training for 3D Maneuver Gear. The greatest difference may be that they are not trained to fight Titans, but instead they are trained to fight against people and shoot their guns while moving at great speed.

Trivia

 * Although the Anti-Personnel 3D Maneuver Gear grants superiority against humans on foot or equal maneuverability/mobility with the Survey Corps using traditional 3DMG due to it's enormous range, Armin has detected flaws in the design. Due to the fact that both the barrels and the hooks are launched from the hands, a user cannot attack while reeling away.
 * Another flaw is that the guns may have incredible stopping power, but if the two shots are fired, the wielder has to reload instantly. The 3D Maneuver gear's blades are much more durable.
 * It is unknown if the rounds are shot by using regular gunpowder or compressed gas.
 * In a desperate situation, the hooks can also be used a a weapon because they are launched at enough speed to pierce human flesh.