Call of Duty: Barrett .50cal Sniper Rifle

Single Player
The Barrett .50cal is almost completely unchanged, with the exception of new attachments and a redesigned scope. The only notable change from Call of Duty 4 is that sniper rifles now have full mobility, the same as SMGs. In addition, it is the first sniper rifle available to the player, while in Call of Duty 4 it is the last.

In Modern Warfare 2, the Barrett .50 cal can be found twice in the single player campaign. On one occasion, it is found in the mission Of Their Own Accord in the room where the player must destroy the enemy vehicles at long range. This version has a thermal scope instead of a sniper scope. However the weapon is immobile, similar to the way it was in One Shot, One Kill, including the scalable zoom function and unlimited ammo. Another is found in Loose Ends in one of the basement rooms of the safe house. Unlike the version found in the earlier level, this one can be carried and used freely, just like in multiplayer.

Multiplayer
In multiplayer, the Barrett is unlocked at Level 4 (Private First Class). The Barrett is capable of firing faster than its sight can settle. Firing too quickly makes the Barrett difficult to use, as it will be extremely difficult for the shooter to see what they are shooting at. This problem is easily mitigated by simply slowing the rate of fire and only firing when the recoil has settled. This requires great concentration, as inexperienced players tend to fire too fast. However, the ability to fire so fast can be an advantage in close quarters when there is no time to switch to a secondary and the player is forced to fire their sniper rifle from the hip. The Barrett is most praised for its ability to deliver one hit kills with a high rate of fire.

Facts
Its closest rival is the CheyTac Intervention, they are very similar weapons, in which they both have the same rate of fire and are both very powerful. This gun is a semi-automatic sniper rifle with very high penetration.