Unlock Assault Riffles
To unlock the assault rifles within multiplayer mode, you must reach a certain ranking. The higher the ranking, the better rifle you will unlock. The following are the ranks needed for different rifles:
Reaching rank 10 will unlock the assault rifle M4.
Reaching rank 25 will unlock the assault rifle G3.
Reaching rank 37 will unlock the assault rifle G36C.
Reaching rank 46 will unlock the assault rifle M14.
Reaching rank 52 will unlock the assault rifle MP44.
Short-Range Unlockables
Short-range guns are important in Call of Duty 4, too, which is why there are certain ranks you can reach that will automatically unlock certain shotguns or pistols. The following is the list of ranks at which unlockable short-range weapons become available:
Reaching rank 16 will unlock the M1911 pistol.
Reaching rank 31 will unlock the M1014 shotgun.
Reaching rank 43 will unlock the Desert Eagle pistol.
Reaching rank 55 will unlock the Golden Desert Eagle pistol.
Unlockable Big-Blasters
The weapons everyone wants when playing a game like Call of Duty 4 are the big-blasting weapons, also known as SMGs. These are the large-caliber, rapid-fire weapons like the Uzi. The following ranks will earn you an unlockable big-blasting gun:
Reaching rank 13 will unlock the mini Uzi.
Reaching rank 28 will unlock the AK-47.
Reaching rank 40 will unlock the P90.
Unlockable Snipers
When you're too far away for a big-blaster to be effective, a sniper rifle will probably be your next best option. To unlock the sniper rifles in multiplayer gaming, reach the following ranks:
Reaching rank 04 will unlock the M40 sniper rifle.
Reaching rank 22 will unlock the Dragunov sniper rifle.
Reaching rank 34 will unlock the R700 sniper rifle.
Reaching rank 49 will unlock the Barret sniper rifle.