In Core modes the G3 is very powerful when the player has a very fast trigger finger. This was reduced in Call of Duty: Modern Warfare Remastered to just 625 RPM. In Call of Duty 4: Modern Warfare, the G3 has a fire cap of 1200, making it in theory one of the fastest killing weapons in the game. Head shots decrease the bullets needed to kill by one if not using stopping power and/or firing at long range. It kills in 3-4 hits (or 2-3 with Stopping Power).

The G3 is a semi-automatic rifle with high damage (40-30 damage), low recoil and very high accuracy.

In multiplayer, the G3 is unlocked at Level 25 (2nd Lieutenant). Overall, it is a great weapon to use in the campaign, especially by those who like its high damage and high hipfire accuracy, and those who think that a small magazine size does not matter considering these advantages. Also it benefits, like the multiplayer version, greatly from reload cancelling. And with concentration and practice, the G3 can deliver high accuracy shots while aiming down the sights. The iron sights are relatively difficult to use at first, but are generally quite clear and simple. All these specifications make firing in bursts or in a semi-automatic-like manner useful when playing with the G3. The G3 also has very high initial hipfire accuracy, equivalent to that of the G36C, but the high hipfire accuracy decreases steadily as the rifle is fired fully automatic (observable by expansion of the crosshair). However, the G3's power is offset by its relatively small magazine size. This makes it a great substitute for a pistol or an empty primary weapon. It has moderate recoil, but it does not matter in most cases as it is a one-hit-kill at most ranges. It is one of the most powerful single player weapons available, dealing a maximum of 160 damage, and a minimum of 100. It is fully automatic, unlike its multiplayer variant. It can be found in most SAS missions and the later USMC levels. The G3 is a very common weapon in the campaign.

Call of duty overgrown