Call of Duty: Modern Warfare 3 Unlockables

Weapon Proficiencies
Here is the list of weapon proficiencies you can unlock for every weapon in Call of Duty: Modern Warfare 3.
UnlockableWhat it does
KickReduced recoil.
RangeIncreased range.
AttachmentsEquip two attachments to the same weapon.
FocusReduced flinch when shot.
MeleeFaster melee.
StabilityReduced sway.
ImpactBetter bullet penetration through walls.
SpeedFaster movement with weapon equipped.
DamageShells do more damage.
BreathHold breath while aiming down the sights.