The following guns will be used in the Xbox 360, PlayStation 3 and PC versions of the video game Call of Duty: World at War (Wii version should be the same)
The M1 Carbine is rarely seen earlier in the American campaign, it is not used up until the Castle level, where it can be picked up from most of the american corpses
The M1918A2 In singleplayer is never seen without a bipod, but it must be unlocked in multiplayer. In Singleplayer, you start with it in the Level Relentless.
Winchester M1897
Unlocked Immediately in Multiplayer, In singleplayer it is Sullivan's Primary weapon. For some particular reason, if you search through cleared out underground bunkers, they are just lying around.
The Most powerful handgun in the game, in .357 Magnum , it was most likely only included as the 'Desert Eagle' of this game. It is never seen in Singleplayer.
A Mobile Machinegun, you first use it in 'Relentless' with a bipod. Later on in Singleplayer it is seen without a bipod. It has a cloth wrapped around the barrel close to the frame, a makeshift handguard. In the level 'Black Cats' dual-mounted on the bow and single mounted on the stern. In Multiplayer it is the last machinegun unlocked.
A technical Error about the grenade launcher in game, the M7 was the only one in service, that is correct, but the M7 is not capable of firing while the launcher is attached. It is first used when you take it off of a dead body when assaulting the Triple 25 guns. They are scattered all over the place when you are defending it.
First seen given to you by Sullivan, whether or not you replace it with a new weapon, it appears in your possession again after you are hit by a Anti-Infantry round, as you are being dragged by Sullivan to the escape boat, but you do not get much of a chance to use it.
The Mosin-Nagant is the first rifle given to you by Reznov, due to his lack of trigger finger [but for some reason firing a PPSh is fine], it is fitted with a scope. Right away you are not given ammo. In later levels they are in the hands of Russian Soldiers. For an unknown reason, they are more rare than PPSh SMGs.
The PPSh is first seen in the hands of Reznov, after he gives you the Mosin-Nagant. Which for some reason he can't fire due to his lack of a right trigger finger, but he can fire the PPSh just fine.
It first makes its first appearance in the Asylum, found in the kitchen, sawed off and with a grip. Later in the Subway, it is seen normally, and are lying around in all of the offices.
PTRS-41
The Large Anti-Tank rifle is always seen with a scope [essentially CoD5's Barrett], but is first seen in single player during 'Vendetta'. Much later in Downfall, one can be found on the second or third level, my mind is fuzzy on the specifics.
Used to execute German Prisoners, as well as your standard sidearm until you replace it.
RGD-33 hand grenade
Molotov Cocktail
"T-34 Machinegun"
During the latter stages of one of the Russian levels you are able to use the pintle mounted machinegun on a T-34 tank. However, instead of a DShK heavy machine gun as one might expect, you are firing a Browning M1919 instead.
Though shown in correct configuration the FG 42 in this game is portrayed as being capable of burst/full auto fire which the real weapon was not capable of.