ACR

The Remington ACR (Adaptive Combat Rifle), is a modern day assault rifle. It is an updated version of the Masada Adaptive Combat Weapon System, which was made by Magpul prior to their licensing agreement with Bushmaster, and later Remington. The weapon borrows traits from other firearms, most notably the ambidextrous operating handle in a forward position, similar to the SCAR. Its internal components are heavily influenced by the AR-18, an updated version of the AR-15 (the original M16 design) that was more reliable. Although the ACR is intended to fire with 5.56x45mm ammunition and uses M16 barrels, the weapon can have M16 type magazines inserted as well as 7.62x39mm ammunition due to the firearm's modular construction, as well as other intermediate rounds popular with civilian shooters such as the 6.8mm SPC and 6.5mm Grendal. The Remington ACR was a candidate for the army's industry day, this and along with the HK416, FN SCAR, Barrett REC7, LWRC M6a2 and Colt ACCM (Colt's improved piston M4). The reason for industry day was to find a future replacement for the M4 carbine. The army is planning to field the last of its M4s in 2010. According to the Infinity Ward forums, the ACR in game is chambered for the Remington 6.8 SPC. .

Call of Duty: Modern Warfare 2
The ACR is first used in the mission Cliffhanger, with a Red Dot Sight, Silencer and Heartbeat Sensor attached. It's damage is equivalent to the M4 Carbine but is much more accurate with little to no recoil. The ACR is a 4 to 5 shot kill(depending on the range) without stopping power, and a 3-4 shot kill with it. It is perfectly steady when aiming down the sights, and has extremely low recoil, making it a very good weapon overall. Because of the high rate of fire and low recoil it makes little difference whether stopping power is used.

In multiplayer, the weapon is unlocked at Level 48. It is highly effective, especially in Search and Destroy, and will give you and your team an edge over the other team.

Weapon Attachments

 * Grenade Launcher (Marksman I)
 * Shotgun (20 kills with the Grenade Launcher)
 * Red Dot Sight (Marksman II)
 * EOTech Holographic Weapon Sight(60 kills while aiming down the Red Dot Sight)
 * Silencer (Marksman III)
 * Heartbeat Sensor (15 kills with the silencer attached)
 * ACOG Scope (Marksman IV)
 * Thermal Scope (20 kills while aiming down ACOG)
 * FMJ (Full Metal Jacket) (Marksman V)
 * Extended Mags (40 kills with Bullet Penetration while using FMJ)