Gold Camouflage

There are some Gold weapons in Call of Duty 4. They are acquired by completing all the challenges for that class(even headshots), except for the gold Desert Eagle, which is achieved when level 55 is reached. Gold weapons have no benefit and are activated like Desert or Blue-Tiger skins. They are lost when Prestige Mode is activated. These weapons include:

The weapons are used to show off skill with that particular weapon class, although plenty of people boost to get them. Most prestige players don't have gold weapons because they are just trying to get higher prestige and they know they will lose them once the reach the next prestige, whereas level 55 non-prestige players are more likely to have them because they are focused on completing all the challenges and don't have to worry about losing their gold weapons.
 * Desert Eagle (Level 55)
 * M1014 (Do all shotgun challenges)
 * Dragunov (All sniper challenges)
 * Mini-Uzi (All sub-machine gun challenges)
 * AK-47 (All assault rifle challenges)
 * M60E4 (All light-machine gun challenges)