User blog comment:Callofduty4/Modern Warfare 3 Weapon Proficiency and Equipment trailer/@comment-92.85.181.62-20111027184036

I for one think that proficiencies are stupid. If someone really masters a weapon, they don't need an artificial improvement to the weapon that makes it superior. Why shouldn't all weapons be equal for all? If you are really that good with it you don't need to unlock something.