ACOG Scope

The ACOG Scope is an attachment available in Call of Duty 4: Modern Warfare, Call of Duty: Modern Warfare 2, and Call of Duty: Black Ops. It has a higher magnification than the other optics (except the sniper rifle's standard scope), making hitting targets at longer ranges easier, but increases the sway of the weapon, and in Call of Duty: Modern Warfare 2, also increases visible recoil. It is analogous to Call of Duty: World at War ' s Telescopic Sight.

Call of Duty 4: Modern Warfare
The ACOG Scope can be used on any Assault Rifle (excluding the MP44), Light Machine Gun, Sniper rifle, or Submachine Gun after the player has unlocked all Marksman Challenges for it (150 Kills). It can also be used on a Sniper Rifle instead of its standard telescopic sight after 100 kills. When equipped, it replaces the weapon's iron sights or sniper scope and provides a moderate zoom. Effective bullet range is not actually affected by this attachment, despite the bar in the class creation screen. The reticle is a red chevron ( ^ ).

Call of Duty: Modern Warfare 2
The ACOG Scope attachment in Call of Duty: Modern Warfare 2 is unlocked by completing the Marksman IV challenge (150 kills) for all primary weapons (except for Sniper Rifles; completing the Marksman II challenge of 25 kills with a sniper rifle unlocks the ACOG Scope). Many players consider the Modern Warfare 2 ACOG Scope to be greatly improved over its Call of Duty 4 counterpart and can be used on many weapons effectively. Achieving 20 kills with the ACOG scope for any primary weapon unlocks the Thermal Scope.

Visually, the ACOG scope in Modern Warfare 2 provides much more peripheral vision than its counterpart in Call of Duty 4. For almost all guns, the ACOG scope takes on the appearance of a cross-hair lined in certain places with glowing orange. The L86 LSW is the only exception to this, and has a SUSAT scope instead, which forgoes the cross-hairs and instead has a single arrow pointing upwards, providing clearer vision but making it harder to hit an enemy that goes prone.

The ACOG Scope causes a considerable increase in recoil, making it fairly difficult to use on guns that do not have very low recoil to begin with. This can be difficult when using weapons with high recoil, as horizontal recoil makes it almost impossible to fire a weapon fully automatically. By using Stopping Power or playing in Hardcore, this should be less of an issue. The standard ACOG Scope's appearance has changed slightly from Call of Duty 4's version. The old chevron reticle is replaced with a cross-hair with mil dots. A red dot in the middle of the cross shows the point of impact. The ACOG Scope is very useful when an enemy triggers an EMP, as even though the red dot and surrounding lines disappear, the black, hair-line cross-hairs remain. Some players actually prefer the ACOG Scope without red light markers because it is more precise and easier to make pinpoint headshots without the red dot in the way. The ACOG Scope in MW2 also differs from the previous game in that there is a further eye relief, improving peripheral vision. However, players still usually opt for the Red Dot Sight or Holographic Sight instead, or only use it until they unlock the Thermal Scope. Using the ACOG Scope on any weapon adds a slight delay when zooming, in comparison to Red Dot Sight, Holographic sight, or iron sight. It is normally only seen on classes built for Long Range, or Sniper Rifles for Quick Scope abilities.

Call of Duty: Black Ops
The ACOG Sight returns in Call of Duty: Black Ops and is available to the player for 750. The ACOG Sight is available on the same types of weapons it has been in previous installments, with the addition of the Python.

Trivia

 * The Modern Warfare 2 ACOG Scope has an unusable BUIS (Back up Iron Sight) on its left side.
 * In Call of Duty: Modern Warfare: Reflex Edition, the ACOG Scope does not have the internal range detail.
 * When applied to the M4A1 in Modern Warfare 2, the name changes to "M4 ACOG Sight" instead of M4A1.
 * When used on the L86 LSW, it appears as a SUSAT scope opposed to the ACOG. The LSW is the only weapon in the series to use the SUSAT.