This is the full weapons list, for Call Of Duty 4 single and multiplayer.

MULTIPLAYER

Ac130
Airstrike
Ak47
Ak74u
Artillery
at4
aw50
barrett
beretta
binoculars
bomb
bomb defuse
c4
claymore
cobra20mm
cobraFFAR
colt45
concussion grenade
desert eagle
dragunov
flash grenade
frag grenade
g3
g36c
hindFFAR
humvee50cal
m1014
m14
m16
m21
m4
m40a3
m60e4
mp44
mp5
p90
remington700
rpd
SAW
Skorpion
usp
uzi
Winchester1200

SINGLEPLAYER

50cal turret technical
ac130(105/25/40mm)
agm114
Airstrike
ak47
ak74u
at4
aw50
barrett
barrett fake* (Don’t know what is it)
beretta
binoculars
bm21 missile
bmp turret
bog mortar turret
bradley turret
brick blaster(also on multi)
brick bomb
c4
camera(10/20/30/45/5fov)
claymore
cobra20mm
cobra air support
cobra FFAR
cobra hellfire
cobra seeker
cobra sidewinder
cod3mg42 turret
colt45
default vehicle weapon
desert eagle
dog bite
dragunov
facemask
flash grenade
frag grenade
g3
g36c
gp25
heli minigun
heli small arms
heli spot light
hindFFAR
hind tmp rocket
hind turret
humvee50cal
hunted crash missile
javelin
m1014
m14
m16
m1a1
m203
m4
m40a3
m4m203
m60e4
mark19
mg42
mi28
minigun player turret
mp44
mp5
p90
parabolic
remington700
rpd
rpg
sa6 missile
saw
skorpion
slamraam missile
smoke grenade
stinger
t72 turret
usp
uzi
winchester1200