Unlockable: Equipment
The following weapons and equipment can be unlocked by attaining the (multiplayer) levels below:
Assault Rifles
* FAMAS - Lvl. 1
* M4A1 Carbine - Lvl. 4
* SCAR-H - Lvl. 8
* TAR-21 - Lvl. 20
* FAL - Lvl. 28
* M16A4 - Lvl. 40
* ACR - Lvl. 48
* F2000 - Lvl. 60
* AK-47 - Lvl. 70
* M14 EBR - Campaign Only
* G3 - Campaign Only
Submachine Guns
* UMP .45 - Lvl. 1
* MP5k - Lvl. 4
* Vector - Lvl. 12
* P90 - Lvl. 24
* Mini Uzi - Lvl. 44
Light Machine Guns
* L86 LSW - Lvl. 1
* RPD - Lvl. 4
* MG4 - Lvl. 16
* AUG HBAR - Lvl. 32
* M240 - Lvl. 52
Sniper Rifles
* CheyTac Intervention - Lvl. 1
* Barrett .50 Cal (AKA M107) - Lvl. 4
* WA2000 - Lvl. 36
* M21 EBR - Lvl. 56
* Dragunov - Campaign Only
Secondary Weapons
* PP-2000 - Machine Pistols Lvl. 1
* Glock 18 - Lvl. 22
* M93 Raffica - Lvl. 38
* TMP - Lvl. 58
Shotguns
* SPAS-12 - Lvl. 1
* AA-12 - Lvl. 12
* Striker - Lvl. 34
* Ranger - Lvl. 42
* M1014 - Lvl. 54
* Winchester 1887 - Lvl. 67
* W1200 - Campaign Only
Handguns
* USP .45 - Handguns Lvl. 1
* .44 Magnum aka Colt Anaconda - Lvl. 26
* M9 - Lvl. 46
* Desert Eagle - Lvl. 62
* M1911 - Campaign Only
Launchers
* AT4-HS - Lvl. 1
* Thumper x2 aka M79 grenade launcher - Lvl. 14
* Stinger - Lvl. 30
* Javelin - Lvl. 50
* RPG-7 x2 - Lvl. 65
Other
* Frag Grenade - Lvl. 1
* Semtex - Lvl. 1
* Throwing Knife - Lvl. 7
* Tactical Insertion - Lvl. 11
* Blast Shield - Lvl. 19
* Claymores - Lvl. 31
* C4 - Lvl. 43
* Knife
* Ice Picks
* Smoke grenade
* Stun grenade
Attachments
* Red Dot Sight
* EOTech Holographic Weapon Sight
* MARS Sight
* ACOG Sight (and various telescopic sights that are specific to certain guns)
* Thermal Scope
* Suppressor
* Grenade Launcher
* Heartbeat Sensor
* Shotgun
* Extended Magazine
* Full Metal Jacket ammunition (replacement for Deep Impact)
* Sniper Scope (will not take up an attachment slot, just like in Call of Duty 4)
* Akimbo
* Rapid Fire (replacement for Double Tap)
* Foregrip
* Tactical Knife