The Following are the Ranks and their unlockables
Unlockable How to Unlock
01 Private 2nd Class All Starting Equiptment
02 Private 1st Class Headgears 1: Tactical Helm, Balaclava
03 Specialist Rainbow Weapons: MP7A1, SIG552, USP40
04 Corporal Camo 1: Desert, Urban, Russian, Guerrilla, Fall, Desert 2
05 Sergeant Tactical Armor: Raven Recon Armor, Vulture Combat Armor, Falcon Assault Armor
06 Staff Sergeant Headgears 2: 3 Hole Balaclava, Baseball Cap, Breathing Mask
07 Sergeant First Class Camo 2: Flecktarn, Orange, Swedish, War2k5, Alpen, White
08 Master Sergeant Freedom Fighter weapons: AK47, Raging Bull, SV98
09 First Sergeant Headgears 3: Bonnie Hat, Beret, Tinted Goggles
10 Sergeant Major Black Market Armor: Typhoon Recon Armor, Cyclone Combat Armor, Hurricane Assault Armor
11 2nd Lieutenant Camo 3: Pink, Blue, Woodland, Wasp, Sand, Crimson
12 1st Lieutenant Headgears 4: Half-Face Mask, Reinforced Helm, Tactical Goggles
13 Captain Merc Weapons: MG36, SPAS12, Deagle
14 Major Military Armor: Vier Recon Armor, Diamondback Combat Armor, Anaconda Assault Armor
15 Lt. Colonel Camo 4: Yellow Urban, Red Urban, Tiger, Rust, Urban 2, Grey
16 Colonel Headgears 5: Ballistic Face Mask, Riot Helm, NVGs
17 Elite Camo 5: Custom 1, Custom 2, Custom 3