ACR

The ACR is an assault rifle in Call of Duty: Modern Warfare 2 and in Call of Duty: Modern Warfare 3.

Single Player
The ACR is the main Assault Rifle used by the player during the Task Force 141 campaign missions, and is used by other TF141 members and Ghost during some missions. It is first available to the player as an optional weapon in The Pit in the mission S.S.D.D. It is also used in the mission "Cliffhanger", with a Red Dot Sight, Silencer, Heartbeat Sensor, and a unique Arctic camouflage that is mostly comprised of natural ice and snow. An ACR Grenadier version with an ACOG Scope and Grenade Launcher is used in "Takedown", while another version featuring Holographic Sight and Grenade Launcher is used in "Loose Ends". A version with a unique matte black finish (though it may initially resemble the standard gray-black finish) and the same attachments as found in "Cliffhanger" can also be found in the mission "Just Like Old Times". It is possible to also receive an ACR from dead Shadow Company soldiers in their respective missions.

Multiplayer
In Multiplayer, the ACR is unlocked at Level 48. It is similar to the M4A1 but sacrifices rate of fire for having extremely low recoil. It carries 30 rounds in its magazine, deals 30-20 damage per shot, and has a fire rate of 750 RPM. Although the ACR bounces when firing, this recoil is purely visual and the weapon has near-zero actual recoil as it resets perfectly before the next shot, making it ideal for long range combat without the need for burst firing. Its moderately low damage per second makes it somewhat weak in close quarters combat compared to other automatic weapons such as the TAR-21, F2000, and SMGs.

A versatile weapon, most Perks and Attachments work well with the ACR, especially Stopping Power, which helps make up for its low damage per round. With Stopping Power, it takes four shots to kill at long range (versus five without the perk), three shots at close range (versus four) and two headshots at close range (versus three without the perk). Another recommended attachment is the silencer. This is so as the ACR's range and accuracy makes it ideal for this attachment. The ACR is very useful at long ranges so therefore it excels in medium to large maps with long lines of sight such as Wasteland, Afghan, Highrise, Derail, Estate, Bailout, and Fuel. Its lack of any recoil means that it is very easy to use with the ACOG and Thermal Scopes, and wasting ammo due to missed shots is usually not an issue (although it also depends on the player's skill to aim well, especially on a moving target). The ACR tends to chew through ammo quickly much like the M4A1, but its accuracy makes missing shots a lesser issue. Also, the ACR is one of the most effective weapons in the game for reload canceling; the player does not even need to wait until the magazine is fully inserted into the rifle before ammo is replenished. Even without the reload cancel, the reload time is still very quick at only two seconds.

In terms of damage output per second, the ACR's moderately low damage and moderate rate of fire makes it the least powerful assault rifle in the game. Still, its effectively non-existent recoil ensures all properly aimed shots are on target, allowing for more expedient kills. Because of these features, it is a very popular assault rifle in Modern Warfare 2.

Weapon Attachments

 * Grenade Launcher
 * Red Dot Sight
 * Silencer
 * ACOG Scope
 * FMJ
 * Shotgun
 * Holographic Sight
 * Heartbeat Sensor
 * Thermal Scope
 * Extended Mags

Call of Duty: Modern Warfare 3
The ACR makes its return as the ACR 6.8 variant in Call of Duty: Modern Warfare 3. First shown at the end of the Call of Duty: Elite trailer, the ACR was also later shown with a mounted Holographic Sight and held by Sandman, in an Amazon pre-order wallpaper. As can be seen from gameplay of Survival mode, the ACR remains fully automatic and uses a similar reload animation to that of its Modern Warfare 2 variant.

Single Player
The ACR is used by Derek "Frost" Westbrook in the mission Scorched Earth with a Hybrid Sight.

Multiplayer
The ACR 6.8 is unlocked at Level 50 in Modern Warfare 3's multiplayer. It has the lowest recoil of all the Assault Rifles, as well as having a good rate of fire and good damage. Combined the fastest reload time in the AR category, these stats can make the ACR work in every situation. However, the ACR does have a slightly slower rate of fire than some of the other assault rifles such as the M4A1 and the G36C. Furthermore, the sights are somewhat bulky at longer range, so an optic (such as Red Dot Sight) is a good option if the player wishes to use the ACR at medium-long range combat. The idle sway also makes it difficult to get all shots hit the target at long range, though this can be negated with Stability. If the player does not have Stability yet (as it is unlocked at weapon level 28), Kick is also ideal for longer range. Attachments can be used to have another attachment, such as Suppressor without having to give up an optic.

Scavenger can be a good choice for the ACR, as it runs out of ammunition rather quickly, and Sleight of Hand is not necessary due to fast reload. For the tier 2 slot, Hardline is a viable choice, depending what Strike Package the player uses. Quickdraw or Assassin are also good options for rushing. For long range combat, Marksman can help spotting the enemy at a distance.

Attachments

 * Red Dot Sight - Unlocked at Weapon level 2.
 * Suppressor - Unlocked at Weapon level 5.
 * Grenade Launcher (M320) - Unlocked at Weapon level 8.
 * ACOG Scope - Unlocked at Weapon level 11.
 * Heartbeat Sensor - Unlocked at Weapon level 14.
 * Holographic Sight - Unlocked at Weapon level 17.
 * Shotgun (attachment) - Unlock at Weapon level 20.
 * Hybrid Sight - Unlocked at Weapon level 23.
 * Extended Mags - Unlocked at Weapon level 26.
 * Thermal Scope - Unlocked at Weapon level 29.

Proficiency

 * Kick - Unlocked at weapon level 4.
 * Impact - Unlocked at weapon level 9.
 * Attachments - Unlocked at weapon level 12.
 * Focus - Unlocked at weapon level 16.
 * Breath - Unlocked at weapon level 22.
 * Stability - Unlocked at weapon level 28.

Call of Duty: Modern Warfare 2

 * On Infinity Ward's website, the ACR was voted the favorite assault rifle in Call of Duty: Modern Warfare 2.
 * The serial number of the ACR in Modern Warfare 2 is 0091436. 91436 is the ZIP code for Encino, CA, where Infinity Ward is located. This can be seen on a few other weapons.
 * When this weapon has a Thermal Scope attached, the pick-up icon's text will read "ACR Thermal Sight" instead of "ACR Thermal Scope".
 * The ACR appears to be larger than any other assault rifle when seen from third person.
 * The ACR seems to be a preferred weapon of Task Force 141 operatives Ghost and Roach.
 * Interestingly, the ACR in Campaign and Spec Ops actually has more recoil than its multiplayer equivalent.
 * In Create-A-Class, the ACR can be seen in a black finish, but if no camouflage is added, it is gray on its camouflage-able parts. However, in "Just Like Old Times", the player can find black ACRs in the steam room where Shadow Company ambushes the player.
 * On the side of the ACR is written "CAL 5.56 EURO". This is best visible with Arctic Camouflage, but can be seen with any camouflage applied.
 * In Campaign, the ACR has a Holographic Sight and Digital Camouflage as seen in "Loose Ends". This ACR's Holographic has zoom level of an ACOG.
 * In Cliffhanger, when the player enters the hangar with the ACR, the caked snow and ice melts off of it, revealing painted Arctic Camouflage.
 * The ACR along with AK47 and the M4A1 when they are equipped with a Grenade Launcher it gives the name of "ACR Grenadier."

Call of Duty: Modern Warfare 3

 * On the side of the gun, it says Remington, the weapon's manufacturer.
 * In the Survival Mode Trailer, it used the same Create-a-Class image from Modern Warfare 2.
 * The ACR uses the same reload animation as the one in Modern Warfare 2.
 * When a magazine is inserted, the sound is the same as that of the M4A1.