Call of Duty: Modern Warfare 3
Weapon Level is a feature introduced in Call of Duty: Modern Warfare 3. Each weapon has its own individual rank and in order to unlock available Camouflages, Attachments, Proficiencies and Challenges, the player must rank up the weapon by using it in combat. When the weapon is leveled up, additional customization options are unlocked, such as the reticle of the attachable sights, excluding the Hybrid Sight, HAMR Scope, and Thermal Scope. Max leveling a primary weapon will unlock Gold Camouflage for the said weapon, although the final level requires substantially more experience than prior levels. The final level is 31 for primary weapons, while for the secondary weapons it's 10. Not all weapons require the same amount of levels to obtain camouflages, attachments and the like. Launcher levels are implemented to add longevity to the weapons, as there are no attachments or camouflages for them. To gain the weapon title for primary weapons, the player must unlock the last attachment, even if it isn't level 31.
The order and level with which items are unlocked for primary weapons remains similar across all types of weapon:
|Weapon Level||Assault Rifles||SMGs||Light Machine Guns||Sniper Rifles||Shotguns|
|2||Red Dot Sight||Red Dot Sight||Red Dot Sight||ACOG Scope||Foregrip|
|3||Classic Camouflage||Classic Camouflage||Classic Camouflage||Classic Camouflage||Classic Camouflage|
|4||Kick Proficiency||Kick Proficiency||Kick Proficiency||Kick Proficiency||Kick Proficiency|
Silencer, Snow Camouflage
|Silencer||Silencer, Snow Camouflage||Silencer||Silencer|
|6||Multicam Camouflage||Snow Camouflage||Multicam Camouflage||Snow Camouflage||Snow Camouflage|
|7||Target Dot reticle||Multicam Camouflage||Target Dot reticle||N/A||Multicam Camouflage|
|8||Grenade Launcher, Digital Camouflage||Digital Camouflage||Grip, Digital Camouflage||Multicam Camouflage||N/A|
|9||Impact Proficiency||Range Proficiency||Impact Proficiency||N/A||Focus Proficiency|
|10||Hex Camouflage||Hex Camouflage||Hex Camouflage||Impact Proficiency||Digital Camouflage|
|11||ACOG Scope Delta reticle||Rapid Fire||
ACOG Scope Delta reticle
|Digital Camo||Hex Camo|
|12||Attachment Proficiency, Rapid Fire||Attachment Proficiency||Attachment Proficiency||N/A||Red Dot Sight|
|13||Choco Camouflage||N/A||Choco Camouflage||Heartbeat Sensor||Choco Camouflage|
|14||Heartbeat Sensor||Choco Camouflage||Rapid Fire||Attachment Proficiency||Attachment Proficiency|
|15||U-Dot reticle||Focus Proficiency||U-Dot reticle||Extended Mags||N/A|
|16||Focus Proficiency||ACOG Scope||Focus Proficiency||Hex Camouflage||N/A|
|17||Holographic Sight||N/A||N/A||N/A||Holographic Sight|
|18||Snake Camouflage||Snake Camouflage||Snake Camouflage||Focus Proficiency||Snake Camouflage|
|19||Mil-Dot reticle||Holographic Sight||Mil-Dot reticle||Thermal Scope||Melee Proficiency|
|20||Shotgun||N/A||Heartbeat Sensor||Choco Camouflage||N/A|
|21||N/A||Melee Proficiency||Speed Proficiency||N/A||Blue Camouflage|
|22||Breath Proficiency||HAMR Scope||Holographic Sight||Variable Zoom||N/A|
|23||Hybrid Sight||N/A||Blue Camouflage||Snake Camouflage||Range Proficiency|
|24||Blue Camouflage||Extended Mags||Omega reticle||Speed Proficiency||N/A|
|25||Omega reticle||Blue Camouflage||Extended Mags||Blue Camouflage||N/A|
|26||Extended Mags||Thermal Scope||Red Camouflage||Red Camouflage||Extended Mags|
|27||Red Camouflage||Red Camouflage||Thermal Scope||N/A||Red Camouflage|
|28||Stability Proficiency||Stability Proficiency||Stability Proficiency||Stability Proficiency||Damage Proficiency|
|29||Thermal Scope, Autumn Camouflage||Autumn Camouflage||Autumn Camouflage||Autumn Camouflage||Autumn Camouflage|
|30||Lambda reticle||N/A||Lambda reticle||N/A||N/A|
|31||Gold Camouflage||Gold Camouflage||Gold Camouflage||Gold Camouflage||Gold Camouflage|
Every primary weapon requires a set amount of XP to attain level 31.
Each secondary has a set amount of Weapon XP needed to attain level 10.
Reaching the final level for a weapon (31 for primary, 10 for secondary) requires much more XP than the previous levels.
Call of Duty: Black Ops II
Weapon level returns in Call of Duty: Black Ops II. Leveling up the player's weapon allows them to unlock attachments for the weapon, the order varying between any two weapons, even within the same category. Camouflages are now unlocked via challenges, such as getting a specific amount of headshots. The order and amount of attachments that can be unlocked varies between weapons. If one manages to level up the weapon enough to unlock all attachments, the player may prestige the gun and unlock new features for it, such as putting the player's clan tag on the weapon. Prestiging the weapon twice and then going on to level up the weapon fully a third time will reward the player a Calling Card exclusive to that weapon.
Call of Duty Online
Weapon level appears in Call of Duty Online as well. Leveling up the weapon allows attachments to be purchasable by Game Points for players. Attachment can be purchased by CoD Points at any time without limited by weapon level. The final level is 31 for primary weapons, while it's 20 for the secondary weapons. If a primary weapon reach level 31, a Hex Camouflage will unlock for this weapon.
Call of Duty: Black Ops III
Weapon levels function similarly to before, unlocking new attachments with each weapon level. Weapons are leveled up through usage, such as getting kills or assists. Each weapon has its own progression bar that is viewable in Create-A-Class.
Call of Duty: Infinite Warfare
Weapon level returns in Call of Duty: Infinite Warfare. As with previous games, leveling up the player's weapon allows them to unlock attachments for the weapon, the order varying between any two weapons, even within the same category. Camouflages are again unlocked via challenges, such as getting a specific amount of headshots. The order and amount of attachments that can be unlocked varies between weapons. If one manages to level up the weapon enough to unlock all attachments, the player may prestige the gun and unlock three exclusive accessories for it.
From January 27th, 2017 to February 3rd, 2017, Double Weapon XP was granted.