Weapon Level

Weapon level is a system in Modern Warfare 3. Each weapon has its own individual rank and in order to unlock its camos, attachments, proficiencies and challenges, the player must rank up the weapon by using it in combat. When the weapon is leveled up, more things are available to be customized, for example the reticle of the Red Dot Sights. Max leveling a weapon will give that weapon gold camouflage.