Red Dot Sight

A  is a type of gun sight (a sub type of reflex sight) that specifically uses a red light emitting diode (LED) at the focus of a curved mirror, producing a red spot reticle as a precise aiming point. In gameplay, it is depicted as what is called an "open sight", similar to a miniature Heads Up Display. It appears as an attachment in Call of Duty 4: Modern Warfare, Call of Duty: Modern Warfare 2, Call of Duty: Black Ops, Call of Duty: Modern Warfare 3 and Call of Duty: Modern Warfare 3: Defiance.

Call of Duty 4: Modern Warfare
"Replace the iron sights with a precision reflex sight."

- Attachment description

Campaign
In the campaign, Red Dot Sights seen are on the G36C, the standard M4A1, the silenced M4A1 SOPMOD, and the P90-SD. There are two types of Red Dot Sights: the scope-like Red Dot unique to the M4A1 and G36C, and the open Multiplayer type, available on the M4A1 SOPMOD and P90-SD.

Multiplayer
In Call of Duty 4: Modern Warfare, the Red Dot Sight is available for all weapons except sniper rifles, pistols, and the MP44 assault rifle. When selected as a weapon attachment, the red dot sight replaces the weapon's iron sights. In multiplayer, the Red Dot Sight is obtained by completing the first marksman challenge of any Assault Rifle, Submachine Gun, Light Machine Gun, or Shotgun. The Red Dot Sight is popular because it allows full peripheral vision and is clearer and easier to use than iron sights. However, the Red Dot Sight does not actually increase the weapon's accuracy.

Call of Duty: Modern Warfare 2
In Call of Duty: Modern Warfare 2, the Red Dot Sight has some changes. The new model is square, smaller, less obtrusive, and allows for a better peripheral view. For the most part, it is similar to the Red Dot Sight in Call of Duty 4. Some weapons now have their own unique Red Dot Sights. The TAR-21 uses the MARS Sight and the F2000 also uses its own red dot sight. All Red Dot Sights, except for the F2000's, are disabled when an EMP is deployed. Getting 60 kills while aiming down the Red Dot Sight unlocks the Holographic Sight for primary weapons. For primary weapons, it takes 25 kills to unlock but for secondary weapons, it only takes 10 kills.

TAR-21 Variant
The MARS Sight, also referred to as the "TAR-21 Red Dot Sight", this variant of the RDS is different mainly because of appearance. It looks somewhat similar to a Holographic Sight, but otherwise works the same as a regular RDS. In the Singleplayer Campaign and in Special Ops, several TAR-21's are fitted with the standard RDS. However, this is not possible in Multiplayer.

F2000 Variant
Also referred to as the "F2000 Scope" or the "F2000 Red Dot Sight", it is the replacement for the standard RDS on the F2000. It is similar in appearance to the Call of Duty 4 campaign's M4A1 (not including the M4A1 SOPMOD) and G36C Red Dot Sight, but is thicker and appears as a long scope. The sight is blurry, and somewhat difficult to use at range because of this. Interestingly, it is not disabled during an EMP. In the Campaign missions "No Russian" and "Loose Ends" an F2000 with a regular Red Dot Sight can be found.

Call of Duty: Black Ops
The Red Dot Sight returns in Black Ops, seen mounted on the Commando in the multiplayer teaser trailer. Unlike the Red Dot seen in previous games, this one has a different design, being rounder and more flush with the weapon. The AK-47 and its derivatives in-game, the AK-74u and RPK, use the Kobra EKP-1S-03M red dot that was designed for the AK frame. The player can customize the color and shape of the reticle along with the lens color. There are 7 reticle colors and 6 lens colors.

Customization
For more information, see Reticle and Lens Customization.

Each custom shape costs. Including the default dot, there are 40 different shapes. The color of the reticule can also be changed for, with the possible lens colors being green, blue, purple, teal, yellow, red and orange. On the Wii, however, Red Dot Sights and Reflex Sights cannot be customized.

Call of Duty: Modern Warfare 3
The Red Dot Sight once again reappears in Modern Warfare 3. It was first seen mounted on a suppressed MP5 in the E3 reveal for Modern Warfare 3. It looks identical to the Call of Duty 4: Modern Warfare variant. It was also spotted on an enemy AK-74u during the E3 reveal, and on an AK-47 in the mission "Black Tuesday". It was also seen on several weapons in the Special Ops trailer. The player has the ability to customize the reticule after leveling the gun; the alternate reticules are the same of the ones for the ACOG Scope and Holographic Sight.

In multiplayer, Assault Rifles, SMGs, and LMGs unlock the Red Dot Sight at Weapon Level 2. Shotguns unlock it at Weapon Level 12, and Machine Pistols unlock it at Weapon Level 7. The Red Dot Sight will give a 1.35x zoom when aiming though it.

Survival Mode
The Red Dot Sight is available as weapon upgrade in Survival Mode at level 7 and costs $750. It can be purchased from the Weapon Armory. It is cheaper than the Holographic Sight while serving the same purpose.

Behind the Scenes
During the Survival trailer, it appeared that there were two types of Red Dot Sights; one similar to the Call of Duty 4: Modern Warfare version and one similar to the Call of Duty: Modern Warfare 2 version. In the final game, however, only the Call of Duty 4 variant appears.

Call of Duty 4: Modern Warfare

 * In Call of Duty 4, the Red Dot Sight reduces the AK-47's minimum damage from 30 to 20.

Call of Duty: Modern Warfare: Mobilized

 * All Red Dot Sights in Modern Warfare: Mobilized are misaligned, the true hit point being slightly higher than the Red Dot itself.

Call of Duty: Modern Warfare 2

 * In Call of Duty: Modern Warfare 2, the zoom of the RDS (and other optics) varies by weapon in singleplayer, but is the same for all weapons in multiplayer.


 * The FAL's and M93 Raffica's red dot sights are slightly off. The shots land below and to the right of the dot.


 * The SCAR-H has a unique beige red dot sight.

Call of Duty: Black Ops

 * The RPK, AK47, and AK74u use a different, bigger and less rounded Red Dot Sight of Soviet origin.


 * On the Wii version of Call of Duty: Black Ops, the color or shape of the reticule cannot be changed.