History

The Minebea PM-9 Submachine Gun, known officially in the Japan Self-Defense Forces as the 9mm Machine Pistol (9mm機関拳銃 Kyumiri Kikan Kenjū?) or as the M9, is a Japanese-made machine pistol. Based on Israeli's IMI Mini-Uzi, the PM-9 has the same telescoping bolt in use from the Mini-Uzis, but it has a difference in terms of its appearance, operational use and handling.
 
It is being exclusively used in J.S.D.F service as its main submachine gun, with the exception of some of its special forces units. The 1st Airborne Brigade and the Western Army Infantry Regiment are the only special forces units in the Japan Ground Self-Defense Force known to be armed with the PM-9 as the brigade's main submachine gun. The J.A.S.D.F uses the weapon for its soldiers when conducting base security.

The PM-9 is produced by Nippon Miniature Bearing Company otherwise known as Minebea. It utilizes the Mini-Uzi submachine gun as the main basis for the PM-9. It was adopted in 1999 for non-frontline forces such as vehicle drivers, artillery personnel, some of its special forces units, and some commissioned officers who were prioritized in having them equipped with the said submachine gun in order to arm them with better equipment.
 
Though it had been used for more than a decade as the official submachine gun, J.S.D.F officials are looking at a possible replacement for the weapon as they are now being planned to be phased out in the near future, one of them being the Heckler & Koch MP5. J.S.D.F troops assigned to do guard duty on garrison bases of both the J.M.S.D.F and J.A.S.D.F had their PM-9s replaced with other high-performing submachine guns with the J.G.S.D.F following suit in having the PM-9 to be eventually replaced.

The PM-9, unlike its Israeli counterpart, has a few differences in terms of appearance with a foregrip mounted underneath the PM-9's barrel to aid in firing the weapon fully automatic with a flash suppressor placed. The weapon can also be modified to have a foldable stock, detachable suppressor and a mounted reflex sight though these modifications are most likely not used in any peacekeeping operations abroad since such activities does not involve Japanese soldiers in combat situations. The initial batches of PM-9s were first made in production with wooden pistol and foregrips before they eventually switched to use plastic grips on the current production PM-9s in J.S.D.F service.

 
There were some questions as to why the weapon was only adopted for J.S.D.F use a decade ago, though the following were said to be reasons why it was done so:
 1.Ability of Minebea Co. to create a quality weapon as it also made the SIG Sauer P220 (Minebea P-9) under license.
 2.Only design able to created with Minebea Co.'s equipment.
 3.At time of selection and adoption, the Uzi was highly regarded as an adequate weapon.
 
Although the reasons said above are quite valid, it was said that the reason why the PM-9 was adopted as the J.S.D.F's main submachine gun is because of the high and costly expenses that would transpire if they were to select the Heckler & Koch MP5 instead.

Singleplayer/Spec-Ops

Multiplayer

The PM-9 is unlocked at level 56 in Modern Warfare 3's multiplayer. Sporting a 32-round magazine, the PM-9 has decent enough power and the fastest fire rate of any automatic weapon in the game at 1090, making the weapon very effective in close quarters. However, the PM-9 has a slow reload time and high recoil, both of which can be partly cured by Sleight of Hand and Kick. Rapid Fire is an interesting choice for the PM-9, as it increases the rate of fire to dizzying levels, making the weapon unmatched at killing from the hip

Attachments

Attachments	Challenges	Icon
Reflex Sight	Get 60 kills while looking through a Red Dot Sight attached to a SMG.
Silencer	Get 60 kills with a Silencer attached to a SMG.
Rapid Fire	Get 30 kills with Rapid Fire attached to a SMG.
ACOG Scope	Get 20 kills while looking through a ACOG Scope attached to a SMG.
HAMR	Get 40 kills with a HAMR Scope attached to a SMG.
Holographic Sight	Get 20 kills while looking through a Holographic Sight attached to a SMG.
Extended Mags	Get 40 kills with Extended Mags attached to a SMG.
Thermal	Get 40 kills while looking through a Thermal attached to a SMG.

Proficiencies

Proficiency	Description	Icon
Kick	Kick Reduces recoil by 20%, allowing for steadier full-auto and faster recovery from shots.
Range	Offers a 25% boosted effective range. This is very useful on Shotguns, particularly the automatic variants. Some SMGs can benefit from this upgrade, as well, especially if you are intent on using medium-range optics.
Attachment	Allows the use of 2 Attachments. It is a solid all-around Proficiency, useful in many situations. This Proficiency is also notably useful for stealth builds, as it allows you to use a Silencer alongside any other Attachment. The Attachment Proficiency is also helpful if you are still getting comfortable with iron sights, as it allows you to take and optical Attachment and a second utility Attachment.
Focus	Reduces visual recoil by 50% when you are hit. Focus is very effective for SMGs and Shotguns. It is also helpful for ARs, as it can keep your shots on target when you enter a heads-up one-on-one firefight.
Melee	Grants 35% faster melee recovery. Melee can be useful if you are stalking targets with a stealth Shotgun build. With the Riot Shield, it allows you to take down targets much more quickly at close range
Stability	Reduces idle sway by 25%. Consider this to be an 'automatic' Breath for long-range combat. It is most useful on LMGs, as they need the enhanced accuracy for long-range shots, though ARs also benefit from it.

Challenges