Stability is a weapon proficiency in Call of Duty: Modern Warfare 3. It reduces idle weapon sway by 25%. This proficiency can be considered an automatic Breath for long-range combat. It is useful on Light Machine Guns, as they need the enhanced accuracy for long-range shots, but it is also useful for Sniper Rifles, as they have the largest amount of sway. It can also be very helpful on sniper rifles when using the ACOG scope, as this attachment disallows holding breath for Sniper Rifles. However, this does not appear to significantly reduce the idle sway of ACOG and Hybrid scopes on Assault Rifles. Its effect is similar to the Ballistics CPU attachment in later instalments.
Stability is a Common gun perk that appears in Call of Duty: Infinite Warfare, found upon certain weapon variants. It reduces recoil while firing for the weapon variant it is applied to. This effect also stacks with the Foregrip attachment.