it should already be unlocked at the beginning
The flamethrower is unlocked at level 65 along with the M1A1 carbine.
Level 10
The Type 100 Sub-Machine Gun is unlocked at level 25. -Cry0-Joe
no because once you go online you will start back from level 1. no emblem, no callsign, no unlocked guns.
In Call of Duty 4: Modern Warfare, the M14 rifle is unlocked at Level 46 in multiplayer.
Yes, the level is purely online it doesn't have to do with your save game.
yes u can play any mission in coop online. (only missions that u have unlocked in solo mode)
It is unlocked as one of your perks when you reach level 65.
The assualt rifle Acr is unlocked at level 48.
The Desert Eagle* is unlocked at level 52.
The AK-47 is unlocked at level 38 , and it costs 2000 cod points.
you rank up to level 65