AW-50

The AW-50 is an anti-material rifle which was supposed to make an appearance in Call of Duty 4: Modern Warfare.

Analysis
The only evidence of its existence lies in the game's files, which when accessed through modding leave an unfinished gun which takes the appearance of the Dragunov, makes the same noise as the Barrett .50cal and has a five round magazine, as well as a very low firecap. It also has less recoil than the Barrett .50cal and does not make any noise when reloading. Note that there is also no ammo counter.

The AW-50 was probably cut because the developers thought two .50 caliber rifles were unnecessary.