Cheats for 360

Call of Duty 4 Golden Weapons
Golden Weapons are purely a cosmetic enhancement.

Golden Ak-47 - Complete all Assault Rifle challenges.
Golden Desert Eagle - Get to Lv.55.
Golden Dragonuv - Complete all Sniper challenges.
Golden M1014 - Complete all Shotgun challenges.
Golden M60 - Complete all LMG challenges.
Golden Mini-Uzi - Complete all SMG challenges.

Assault Rifle - G3 - Reach Rank 25
Assault Rifle - G36C - Reach Rank 37
Assault Rifle - M14 - Reach Rank 46
Assault Rifle - M4 Carbine - Reach Rank 10
Assault Rifle - MP44 - Reach Rank 52
LMG - M60E4 - Reach Rank 19
Pistol - Desert Eagle - Reach Rank 43
Pistol - Golden Desert Eagle - Reach Rank 55
Pistol - M1911 - Reach Rank 16
Shotgun - M1014 - Reach Rank 31
SMG - AK-74U - Reach Rank 28
SMG - Mini Uzi - Reach Rank 13
SMG - P90 - Reach Rank 40
Sniper Rifle - Barret - Reach Rank 49
Sniper Rifle - Dragunov - Reach Rank 22
Sniper Rifle - M40 - Reach Rank 04
Sniper Rifle - R700 - Reach Rank 34

Weapons on multiplayer.