Sabertooth

The Sabertooth was a gun/weapon planned to be in Call of Duty: Black Ops. The only remaining evidence of it is it's presense in the weapons folder under "sabertooth_zm". According to the files, it had an abnormally large clip of 999 and a reserve of 999000, which may suggest that it was used for testing purposes. It would seem that another variant called the Sabertooth 360 was also planned, which has a much more "normal" clip size of 72. Evidently they also both had pack-a-punched versions. The Sabertooth and it's 360 variant can be found on this stat table of scrapped/unused zombie weapons.