The G11 is rarely used in single player, but appears several times both with and without the Low Power Scope in the mission "Numbers" and is Clarke's primary weapon after the first weapons cache.
The G11 has a large 48-round magazine and fires a very quick 3-round burst with a high firing cap and has the same hip firing spread as SMGs, despite it being an assault rifle. It also uses iron sights similar to the FAMAS in Modern Warfare 2 and the AUG in Black Ops. The reload animation for the G11 varies from other assault rifles in Call of Duty: Black Ops as the gun loads from a horizontal magazine. The G11 is not a traditional cartridge firearm but instead a caseless one; when reloading or equipping the weapon the player charges the weapon by rotating a "bolt". The G11 is a "Classified" weapon, meaning it is unlocked by buying all other assault rifles.
The G11 is similar to the M16, but has less distance and less damage. Both guns still require the same amount of bullets to kill in core modes, however. In hardcore, the G11 needs 2 bullets to land to get a kill at longer distances, whereas the M16 only needs one. However, the G11's low recoil, and smaller hip fire spread makes it much more effective than the M16 in certain situations, such as close quarters combat.With the Variable Zoom Scope the G11 is useful at extreme ranges in Hardcore gamemodes.
Since the G11 only has two attachments, both being optics, there's no use for the perk Warlord, freeing up a slot.Sleight of Hand Pro is recommended, as it cuts it's comparably long reload time (when completely empty) in half and makes target acquisition faster, which helps when shooting targets at long range.
It should be noted that the Variable Zoom Scope also zooms in faster with Sleight of Hand Pro.
Considering it has such a small hip spread, it can be used in tandem with Steady Aim and become a powerful hip fire weapon, taking few burst contact at close range to kill. Its large magazine also eliminates the need for constant reloading common to SMGs. These advantages can make it appropriate for close range to medium-long range fire.
The G11 is available in Kino der Toten and "Five" through the Mystery Box. It comes with a Low Power Scope and has an accurate three round burst. The G11 is good for headshots due to its low recoil and sway; however, it can be troublesome in higher levels and close quarters.