The Famas is found in the later stages of Call of Duty: Black Ops, mainly on CIA and Spetsnaz operatives, with various attachments. In the level "Redemption," a Famas with a Reflex Sight and Dual Mags is one of Mason's starting weapons.
The Famas is the fourth assault rifle unlocked, and is available for purchase at level 14. The Famas, being an assault rifle, excels at close-mid range. As with all automatic weapons, it has moderate recoil during automatic fire, so bursts are recommended. On the Famas burst-fire is necessary at range due to the associated recoil (up and to the right). The Famas holds its own very well in close quarters due to its very high rate of fire, especially in Hardcore where its high rate of fire allows it to compete reasonably well with SMGs.
It requires three shots at close and four at longer ranges to kill, which is the same as other assault rifles, though it cannot kill with two headshots, and cannot kill in one shot at long range in Hardcore modes. The gun's major drawback is relatively high recoil during sustained fire. The Famas suffers from significant rightward and slightly upward Recoil, Dual Mags, Sleight of Hand and Scavenger are good choices for the Famas, as its high rate of fire chews through ammo rather quickly.
Overall the Famas is a rather versatile weapon; due to its 3-4 shot kill ability and high rate of fire compared to other assault rifles, the Famas and AUG (which are virtually identical statwise) both have the second highest DPS of any fully automatic gun in close quarters after the Skorpion, while at long range are second only to the Stoner63.
The Famas in Nazi Zombies can be acquired from the Mystery Box. It has a good rate of fire, but ammo becomes problematic as the player will burn through it quickly. It may be helpful to go for headshots, since it only requires a few bullets to kill a zombie even past round eight. Overall, it's not an ideal weapon to use as the ammo is very low added ontop of the high rate of fire will leave you dependant on max ammo after one-two rounds.
When Pack-a-Punched, it becomes the "G16-GL35", which comes with an increase to magazine capacity and adds a Red Dot Sight with a smiley face reticle with a random color. However, ammo is still a problem, so it should be traded in for something better by round 20.