It also makes it easier to use the M40A3 at closer ranges and facilitates quick-scoping, due to the ACOG's reduced magnification and aiming time compared to the sniper scope however, visual recoil is increased significantly, and the scope will block the target if the player happens to miss. This means that, when combined with Stopping Power, it is a one-shot-kill anywhere on a non-Juggernaut. The M40A3 has an unusual feature shared only with the S-Tac Aggressor: when it is equipped with the ACOG Scope, its base damage is raised from 70 to 75. The M40A3 also has less recoil than the R700 or the S-Tac Aggressor, and has a quieter firing sound which may make detection by foes more difficult in Hardcore. It reloads per individual bullet, making it slow to load when completely empty but easy to top off if only a shot or two has been expended. It also has a faster fire rate than the S-Tac Aggressor. This allows players to switch to/from the M40A3 more rapidly. It has the fastest raise/drop time among all sniper rifles, tied with the R700. The M40A3 has some favorable handling characteristics. The M40A3 shares ammo with the G3, R700, M21 and M14. 50cal with Stopping Power against enemies that are not using Juggernaut. However, with Stopping Power against targets not using Juggernaut, the M40A3 is just as powerful as the R700 and Barrett. This also means that the M40A3 is less than ideal for killing Juggernauts even when it has Stopping Power equipped, as Juggernaut and Stopping Power cancel each other out. This makes it one of the weakest sniper rifles without Stopping Power, and means that Stopping Power is practically a necessity. Without Stopping Power, the M40A3 is a one-shot kill only to the head and neck, and its rate of fire is too low to reliably two-shot kill. The M40A3 has one major disadvantage that other sniper rifles do not have it is comparatively difficult to use without Stopping Power. It has a five round magazine that is loaded one round at a time.

It has lower recoil and less sway than the R700, so it is easy to track targets if the first shot did not kill the target. The M40A3 is one of two bolt-action sniper rifles, the other one being the R700. It is unlocked at rank 3, and is a favorite among experienced and inexperienced players alike. It is the first sniper rifle to be unlocked, and as with all sniper rifles it is best used at a long range. The M40A3 is only available in the multiplayer game mode, and is the only sniper rifle in-game with this distinction. Effective at long range.' - Weapon description

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