The following guns appear in the video game:
Glock 17
Desert Eagle
Heckler & Koch MP5A5
TDI Vector
The TDI Vector in the game is referred as the 'TD-V 0.45 SMG' and it costs $35,000.
QCW-05
The QCQ-05 appears in the game as the 'Type 05 SMG'.
FN P90
Heckler & Koch G36C
FAMAS G2
QBZ-03
M4A1
Heckler & Koch HK416
FN SCAR-L
The FN SCAR-L comes in the game with the desert tan paint and costs $21,000.
AK-47
Dragunov SVD
VSS Vintorez
Barret M107
DSR-1
Knight's Armament M110
Remington 870
Hawk Semi-auto Shotgun
AA-12
M249 SAW
PKM
M32 MGL
RPG-7
AS-KR1
Sniper Launcher aka S8-Z "Grand Pinger"