We’ve got the complete list of 10 Assault Rifles, 6 Sub Machine Guns, 5 Light Machine Guns, 6 Sniper Rifles, and 6 Shotguns. 33 primary weapons confirmed in total for Call of Duty: Modern Warfare 3.
PRIMARY WEAPONS
Assault Rifles
M4A1
M16A4
SCAR-L
CM901
TYPE 95
G36
ACR 6.8
MK14
AK-47
FAD
Sub Machine Guns
MP5
UMP45
PP90M1
P90
PM-9
MP7
Light Machine Guns
L86 LSW
MG36
PKP PECHENEG
MK46
M60E4
Sniper Rifles
Barrett .50 CAL
L118A
Dragunov
AS50
RSASS
MSR
Shotguns
USA512
KS612
SPAS-12
AA-12
STRIKER
MODEL 1887
Riot Shield
Be sure to check our detailed list of MW3 Deathstreaks and the complete list of Secondaries and Attachments.