The G11 has a large 48-round magazine and fires a very quick 3-round burst (1250 rpm inside the burst with a .2 sec delay between bursts). It is as accurate from the hip as an SMG, despite being an assault rifle. The G11 uses the same iron sights as the Famas, Commando, Enfield and AUG. The G11 is a "Classified" weapon, meaning it is unlocked by buying all other weapons of its type (Assault Rifles).

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 using caseless ammunition. The G11 does not function like a traditional firearm; when equipping or reloading this weapon, the player rotates a knob near the rear of the weapon instead of pulling a charging handle.

The G11 is similar to the M16, but has a shorter damage drop off, better hipfire, larger magazine, less available attachments, less damage, and a higher rate of fire because of the quicker burst (M16 fires at 937.5 rpm inside the burst compared to the G11's 1250 rpm). Both guns require the same amount of bullets to kill in core modes. In Hardcore, the G11 needs 2 shots to get a kill at longer distances, whereas the M16 only needs one. The recoil is very different from the M16: the G11's recoil sprays towards the right, while the M16's goes up. This, coupled with faster firing rate, make it more suited for close-quarters combat than an M16.

The G11 has significantly larger ammo capacity than other assault rifles, as well as more total ammo than any other weapon, even with Dual Mags (the Galil and MPL being the only exceptions; it ties the MPL's 192, and is only bested by the Galil's 210). With the Variable Zoom Scope the G11 is useful at extreme ranges in Hardcore gamemodes. Both the Variable Zoom and the Low Power Scope are also helpful in Hardcore gamemodes because at close-medium range only one bullet is needed to kill, and the idle sway will make the 3-round burst create a tight triangle of bullets rather than putting all 3 in the same spot, increasing the chances of a hit when one normally would have missed.

Since the G11 only has two attachments, both of which are optics, there's no use for the perk WarlordSleight of Hand Pro is recommended, as it cuts its comparably long reload time (when completely empty) in half and helps accelerate target acquisition, which helps when shooting targets at close range, especially with the long ADS time of the G11's scopes. But Scout, paired with Variable Zoom, could transform the G11 into a burst-fire sniper rifle.

It should also be noted that the Variable Zoom Scope also zooms in faster with Sleight of Hand Pro, since the G11 is not classified as a Sniper Rifle. And, considering it has such a small hipfire spread, it could also be used with Steady Aim to become a powerful close-quarters weapon. The large magazine offers the ability to sustain a long-lasting stream of fire at close range, unlike most submachine guns.

All in all, this rifle has significant advantages over the M16, and is thus more popular online. But, due to its lack of attachments it may suffer from difficulties that an M16 would not encounter. For example, the added strategic advantages of underbarrel attachments like the Grenade Launcher or Masterkey are impossible to utilize with the G11, and there exist no long-range scopes that do not have idle sway. The most significant drawback of this weapon, and of all three-round burst weapons, is the inconsistency of burst fire. Taking fire causes flinch, which causes shots fired to miss the target. Matched against a fully-automatic weapon, it is possible for a G11 to miss every shot due to the flinch.