The following guns will be used in the upcoming video game Call of Duty: World at War
United States Marine Corps
M1 Garand
M1 Carbine
WW2 era
M1 Carbine with spare magazine pouch - .30 Carbine
M1 Thompson
Marines of this era were issued 1928A1 Thompsons in Japan, and it's clear that's what they are using as they have muzzle brakes and adjustable sights.
Browning Automatic Rifle
File:CodWaWBAR.jpg The player using a BAR at the E3 2008 game conference's co-op presentation of Call of Duty: World at War.
Winchester M1897
A marine advancing with a Winchester M1897.
M1903 Springfield
M1911 pistol
File:CoDWaWcolt.jpg The player reloading a M1911 pistol at the E3 2008 game conference's co-op presentation.
Mk 2 hand grenade
M2 Flamethrower
M9A1 Bazooka
File:CoDWaWbazooka.jpg The player and his co-op team mate using M9A1 Bazookas at the E3 2008 game conference's co-op presentation.
Browning M1919
File:CoDWaW30calTank.jpg A Browning M1919 machine gun in a ball mounting on the front hull of a tank (propably a M4 Sherman).
Browning M2
File:Gfdgz.jpg A Browning M2 machine gun mounted on a PBY Catalina flying boat
M7 Grenade Launcher
Imperial Japanese Army
Arisaka Rifle
We can't see if in some of these screens it's a Type 38 or Type 99 Arisaka Rifle yet.
Arisaka Type 99 Rifle - 7mm Japanese
File:CodWaWType99.jpg The player using a type 99 rifle at the E3 2008 game conference's co-op presentation.
Arisaka Type 100
Type 30 Bayonet
Type 97 hand grenade
Type 95 NCO Army Guntō
File:CODWaWBAR.jpg A japanese non-commissioned officer cutting a marine with his type 95 NCO Army Guntō.
Red Army
Mosin Nagant
File:SLG-MN9130S.jpg Mosin Nagant 91/30 Sniper Variant with Russian PU Sniper Scope and down-turned bolt handle
A soviet soldier holding a Mosin Nagant Sniper Variant.
SVT-40
PPSh-41
File:CODWaWPPsh41.jpg Two soviet soldiers going to execute two german POWs with their PPSh-41 Submachine Guns.
Double-barreled shotgun
Tokarev TT-33
Molotov Cocktail
The player playing as a soviet soldier is lighting his Molotov cocktail.
Wehrmacht
Karabiner 98k
Gewehr 43
File:CoDWaWGewehr43.jpg The player as a marine is using a german Gewehr 43 against japanese soldiers in the multiplayer mode.
MP40
Walther P38
Model 24 Stielhandgranate
Panzerschreck