Select Fire

Select Fire was a cut Call of Duty 4: Modern Warfare, Call of Duty: World at War, and Call of Duty: Black Ops attachment. It is set to appear in Call of Duty: Black Ops II.

Overview
In Call of Duty 4: Modern Warfare, it was set to appear on the assault rifles, as proven below. In Call of Duty: World at War, It allowed player to switch the fire mode of the STG-44, M1A1 Carbine, and SVT-40 between semi-automatic and full-automatic. In Call of Duty: Black Ops, it was shown to be initially available as an integrated attachment for the Galil. Although this feature was present in Call of Duty and Call of Duty: United Offensive, it was cut from subsequent games due to lack of real use. This may have contributed to the attachment's cut from the finished games.

It is mentioned in the Call of Duty: World at War strategy guide, which was released before the game's release.

Call of Duty Black Ops II
Select Fire Attachment is seen in a IGN picture on a M8A1.

Trivia

 * On the Helicopter Ride map, the "M4A1 Carbine Full-A" text can be seen. This refers to fire selection in very early Call of Duty 4: Modern Warfare versions.