What happens in call of duty 4 when you reach level 55?

The Lvl 55 Unlockables are, Golden Desert Eagle, Golden Camo some guns can't have weird... should have all guns all perks, and to get things like red dot sight you have to do achievements, i know them because i have lvl 55 but, sadly i got cod4 but code not work because one person already got i had his and i got the lvl 55 code from a site can't rember though :( but if u want it i will try to find it. I will make a question on "How to get to lvl 55 easy?" and it will have the link!