List of the weapons:
USP - HK USP 9 (Heckler and Koch Universal Self-loading Pistol 9mm)
Beretta - Beretta M9
Socom - Colt OHWS USSOCOM (Offensive Handgun Weapon System, United States Special Operations COMmand)
M1911 - Colt M1911
P99 - Walther P99
Desert Eagle - IMI(IWI) Desert Eagle .50 AE (Israel Military/Weapons Industries)
Raffica - Beretta M93 Raffica
Uzi - Uzi (Named Uzi, but it looks like an Ingram MAC-10 more than Uzi)
Skorpion - Skorpion vz. 61
Glock 18 - Glock 18
Patriot - (Looks like a mauser, but it`s automatic in the game)
Cyclone - The "Cyclone" from another game
AKS 74 - Kalashnikov AKS74
UMP - HK UMP .45 (Universal Machine-Pistol .45 ACP)
MP5 - HK MP5 K PDW (Machine-Pistol 5th generation Kurz/short Personal Defense Weapon)
Vector - Kriss Vector (TDI Vector / Super V)
Phantom - Spectre M4 "Phantom"
RCP 90 - FN P90
* Medic`s firearms:
M4 - Colt M4
Famas - Nexter FAMAS / FA-MAS (Fusil `de Assaut de la Manufacture d`Armes de Saint-Etienne / Assault rifle from the Saint-Etienne weapon Factory))
Scar - FN SCAR L (Special Operations Force Combat Assault Rifle)
G36 - HK G36 (Gewehr/ Rifle)
Dragon - DataDyne Dragon
AK 47 - Kalashnikov AK47 (Automat/Auto Kalashnikov manufactured by 1947)
Cougar - Cougar Magnum
Needler - Needler
357 - S&W .357 Magnum
.44 - Taurus .44 Magnum
Colt 45 - Colt .45 Derringer Magum
500 - S&W 500 Magnum (Smith and Wesson)
* Commando `s firearms:
Saw - M249 SAW LMG (Squad Automatic Weapon, Light Machinegun)
RPD - Soviet RPD LMG (Ruchnoy Pulemyot Degtyareva / Hand-held Machinegun of Degtyareva)
AUG HBAR - Steyr AUG HBAR LMG (Armee-Universal-Gewehr / Universal Army Rifle)
First Blood - M60 LMG (Modified to have a drum magazine in the game)
Minigun - Minigun M134
OICW - HK XM29 SABR OICW (Objective Individual/Infantry Combat Weapon)
RPG - RPG (Rocket-Propelled-Grenade)
Javelin - FMG-148 Javelin
Stinger - FIM-92 Stinger
Thumper - M79 "Thumper"
M-32 - Milkor MGL / M-32
Commando - M202 FLASH (FLame Assault SHoulder Weapon)
* Tank `s firearms: (Shotguns only on the picture)
Defriender - (Looks like the Benelli M1014, but not sure)
SPAS 12 - Franchi SPAS-12
AA 12 - Atchisson AA12
Striker - Armsel Striker
Omar - (A double-barrel shotgun)
Judgement - (A shotgun from Terminator 2: Judgement)
* Assassin `s firearms: (Sniper rifles only on the picture)
Scout - Steyr Scout
Barrett - Barrett M82
Dragunov - Dragunov (SVD)
Jackal - (A sniper rifle from The Day of the Jackal)
AWP - AI AWP (Accuracy International, Arctic Warfare Police)
Crossbow - Crossbow
Combat Knife - Combat knife
Bat - Baseball bat
Baton - Nightstick
Nine Iron - Golf club "Iron"
Machete - Machete
Katana - Katana