M9

The M9 is a handgun that appears in Call of Duty 4, Call of Duty 4: Modern Warfare (Nintendo DS), Call of Duty: Modern Warfare 2, and Call of Duty: Modern Warfare: Mobilized. It has a very high magazine capacity, low recoil, and low damage, and suffers from a short range.

Singleplayer
The M9 is the standard pistol for the USMC. It is the starting pistol in most of the USMC missions. Most enemies use the M9 as their sidearm, the exception being the Desert Eagle-wielding soldier in Crew Expendable. It is very common in the majority of levels. The levels in which it cannot be obtained in are F.N.G., The Coup, Aftermath, and Death From Above. It is statistically the best pistol in single player, because of its virtually nonexistent recoil, high capacity, and decent power, but it really does not matter due to the abundance of enemy weapons available to pick up. It is actually the only pistol unable to achieve a one shot kill.

If the player carries an MP5 or a Mini-Uzi, then uses an M9 as their sidearm, this effectively combines all maximum ammo for both weapons. Meaning, if the player empties a magazine in the MP5, it takes 30 shots from the overall reserve ammo count, and so the player will have 30 fewer shots to fire from the M9.

Multiplayer
The M9 has the highest magazine capacity of all the pistols and has the lowest recoil. However, it has the shortest range. Despite this, at close range, the M9 is just as powerful as the USP .45 and M1911 .45. However, its larger capacity and better hip fire accuracy while moving balance it out. In addition, the M9 has one large bonus none of the other pistols possess; like in single player, it can share ammo with the MP5 and Mini-Uzi. With Bandolier, this effect is even greater; giving the player 270 rounds (with the MP5) or 282 (with the Mini-Uzi).

If the player is not carrying a pistol when falling into Last Stand, an M9 will be used.

Call of Duty 4: Modern Warfare (Nintendo DS)
In the Nintendo DS version of Call of Duty 4: Modern Warfare, the M9 appears as the only sidearm in the game. It is almost identical to its console and PC counterpart in appearance, but is much weaker than on the consoles, taking a maximum of 20 shots to the limbs for one kill at range. Like all other weapons in the game, it has no idle sway and no reload animation. A lack of a fire-cap makes this weapon automatic, its rate of fire varying by mode, but always very low.

Single Player
The M9 returns in Call of Duty: Modern Warfare 2 as a standard sidearm for the Rangers, and TF141 on some levels. The M9's appearance seems to have been slightly touched-up from Call of Duty 4, as it seems to be slightly shinier and a deeper black. An M9 Akimbo can be found in The Gulag in the armory, where the player is told to equip the Riot Shield. It is also occasionally dropped by the divers or the airport security guard in the Museum as M9 Akimbo.

Multiplayer
It now has higher minimum damage, penetration, and fire rate, but is unlocked at Level 46, and possesses higher recoil. It is the default handgun used for Last Stand when the player is using a secondary weapon that is not a handgun or the M93 Raffica, regardless of the player's level, and does not have any attachments.

Even while using ADS, the M9 recoils slightly side-to-side and somewhat upwards. Because of this, it is nearly impossible to fire accurately at range, unless it is fired slowly, letting the recoil settle. However, at close range it can be fired as quickly as the user can push the fire button.

Due to a glitch, when firing the M9 with a silencer, the player still shows up on the enemy's radar, which completely defeats the purpose of using a silencer, as well as lowering the weapon's effectiveness at short-medium range.

The M9 no longer retains its advantage over the USP .45 with higher hip fire accuracy, as both are the same, nor is it relatively accurate compared to the other handguns. The USP .45 has a slightly longer 3 hit kill range, with the disadvantage of a 3 round smaller magazine, and higher recoil.

If used with Stopping Power on Hardcore, the M9 one-shot kills at any distance, like the USP .45. This makes it a highly effective weapon, and can be good for completing the M9's challenges.

Due to a glitch in the game, the M9 Expert challenges stay locked until the Desert Eagle is unlocked at level 62.

Weapon Attachments

 * FMJ
 * Silencer
 * Akimbo
 * Tactical Knife
 * Extended Mags

Singleplayer
The M9 reappears in Call of Duty: Modern Warfare: Mobilized as the one of the two side arms available in-game. The M9 is significantly different from the console versions, as it has much higher damage, increased recoil, and is nickel-plated. In singleplayer, the M9 is available in four missions; "Training", "Distant Information", "Wrecking Crew", and "Interception". It is basically the same as the USP .45 now, but it is used more often than it and sports a unique plated color scheme. It is not capable of 1 shot kills(except headshot), but can kill in 2-3 shots at any range.

Multiplayer
In multiplayer, the M9 is the default side arm for the Insurgency faction. Just like in singleplayer, there is no difference between the USP .45 and the M9. Because of this, it shares the same characteristics as the USP .45, such as LMG-like hipfire accuracy when moving, near perfect hipfire accuracy when standing still, perfect hipfire accuracy when crouched, and moderate power.

Call of Duty 4: Modern Warfare

 * In the DS version the M9 is the only secondary weapon and sidearm available. It is also automatic with a low rate of fire.

Call of Duty: Modern Warfare 2

 * In the DS version, the M9 and USP.45 both have no magazine when reloading.
 * The challenge screen incorrectly states that the M9 is unlocked at Major II, when it is in fact unlocked at Lt. Colonel I.
 * Using an M9 with the Tactical Knife attachment will misalign the iron sights. The actual bullet will land slightly to the right of the sights.
 * A glitch makes the M9 with silencer appear on the minimap when fired, making its affects almost redundant. This also applies to the MG4 and the M240.

Miscellaneous

 * As with all other handguns, when the player sprints with the M9, they will hold the gun with two hands in first-person while in third-person the player only holds it with one hand.
 * When "reload cancelling" the M9 or the M93 Raffica in Modern Warfare 2 by sprinting for a couple of seconds just after hitting the reload button, one can hear a short clicking sound. This sound was actually also used in Call of Duty 4: Modern Warfare as part of the main reloading sound for the M9 when reloading from an empty magazine, which was taken from Call of Duty 3, which also used the same sound when reloading the Walther P38.

Video
thumb|374px|right|M9 Attachment Overview

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