A number of guns can be found in this game,both classical ones like Uzi and modern ones like G36.Only one primary and secondary gun can be caried at a time.
Assualt rifles
AK-47
Kalashnikov AK-47, 7.62x39mm
M16A2
M16A2, 5.56mm with M203, 40mm
Heckler & Koch G36
Heckler & Koch G36,5.56mm
Steyr AUG
Heckler & Koch G11
SMGs
MP5A3
Heckler & Koch MP5A3, 9mm
Uzi
MAC-10
Type 64 SMG
Heckler & Koch SMG-2
Shotguns
SPAS-12
Franchi SPAS-12, 12 Gauge
Pancor Jackhammer
Pancor Jackhammer, 12 Gauge
M1014
Sniper rifles
SVD Dragunov
Heckler & Koch PSG-1
Heckler & Koch PSG-1, 7.62x51mm NATO
Barrett M82
Machine guns
FN Minimi
M2HB
Handguns
Glock 17
Desert Eagle
SOCOM
SOCOM, .45 ACP(laser diode is absent)
Colt Anaconda
Makarov PM
Rocket launchers
RPG-7
LAW 80