Weapon Proficiency

Weapon Proficiencies are a type of weapon customization featured in Call of Duty: Modern Warfare 3 and Call of Duty: Vanguard.

Call of Duty: Modern Warfare 3

In Call of Duty: Modern Warfare 3, Proficiencies are unlocked as the weapon is leveled up. Only one Proficiency can be put on a single weapon and is only allowed to be put on primary weapons (including the second primary with Overkill Pro). All primary weapons have 6 available Proficiencies, except Submachine Guns, which have 7, and the Riot Shield, which has only 2 (Speed and Melee)

When the player unlocks the Specialist Bonus with the Specialist Strike Package, they are able to use all but three of the Weapon Proficiencies (Damage, Breath, and Attachments) on any gun. If any Proficiency besides the ones previously mentioned are currently on a weapon the player is using, it will not be stacked with the Specialist Bonus.

Picking up any dropped weapon will not give the player the weapon proficiency that the owner of that weapon had. The gun will act as if it has no proficiency, with the exception of Attachment. The gun's attachments (including the second attachment installed via the Attachment proficiency) and camouflage remain intact.

List of Proficiencies

Weapon Proficiency	Description	Icon	Weapons Available
Kick	Reduced recoil.		All weapons, except the Riot Shield.
Range	Increased range.		Submachine Guns and Shotguns only.
Attachments	Equip two attachments to the same weapon.		All weapons, except the Riot Shield. (Is available on the Model 1887 but has no use)
Focus	Reduced flinch when shot.		All weapons, except the Riot Shield.
Melee	Faster melee.		Shotguns, Submachine Guns and the Riot Shield only.
Stability	Reduced sway.		All weapons, except Shotguns and the Riot Shield.
Impact	Better bullet penetration through walls (similar to Deep Impact and FMJ).		All weapons except for Submachine Guns, Shotguns and the Riot Shield.
Speed	Faster movement with weapon equipped.		Light Machine Guns, Sniper Rifles, and the Riot Shield only.
Damage	Shells do more damage.		Shotguns only.
Breath	Hold breath while aiming down the sights.		Assault Rifles only.

Call of Duty: Vanguard

Weapon Proficiencies return in Call of Duty: Vanguard as Proficiencies and unlike in Call of Duty: Modern Warfare 3, they are put on as an attachment in the attachment category.

List of Proficiencies

• Steady
• Disable
• Wreck
• Nerves of Steel
• Tight Grip
• Frenzy
• Sleight of Hand
• Acrobatic
• Panic
• Perfectionist
• Fleet
• Unmarked
• Brace
• Akimbo
• Gung-Ho
• Vital Focus
• Quickscope
• Spotter
• Vital
• Pressure
• Hardscope
• Aquisition
• Shrouded
• Refresh
• Focus
• Awareness
• Silent Focus
• Momentum
• Discard
• Pinned
• Wreck
• Icy Veins 
• Dismantle
• Driller
• Surveil

Videos

Official Call of Duty Modern Warfare 3 - Weapon Progression Behind the Scenes Video