Cool. Yeah, the visuals are something we can look up even in wikipedia and see that they're pretty accurate. But sounds, handling etc... not so much.
I was also thinking in terms of balance. In reality, some countries had better weapons in general, but in gameplay, you couldn't have the enemy stuck with shoddy weapons. So I had to assume that some weapons got a buff and are made to be more (or less) powerful than in real life. And I assume that the stopping power is pretty different too.
Well in the first COD they had some German arms, that weren't out, until closer to the end of the war, but if I remember right, they weren't in the game until later levels, so they did a pretty good job. Like a model rail road, you can't really pull 100 cars on most layouts, and you're representing miles, in a few feet, so you make compromises. In reality, the 1903 Springfield bolt action rifle (the sniper rifle), fired the same round as the M1 Garand, but it would kick more, because the way a Garand works, some of the recoil is absorbed by the gas piston cycling the weapon, and the number of rounds were correct, for the weapons. You also have to remember that, a German K98 Mauser bolt action rifle, fired a big bullet too. The only real weapon the was better going in, were the M1 Garand, and the M1 carbine. Germany had a good sub machine gun (MP40), in 9mm, we had the Thompson, in .45acp. it matched the sidearm caliber, as did Germany's Lugers and P38's were also 9mm. Where they lacked a nice semi auto rifle in the beginning of the war, towards the end they evened it up pretty good. Right from the beginning the Germans had a better machine gun. The MG42, which is close to .30 caliber, fired so fast, it sounded like a buzz saw, and the U.S. army had a special training film because it was so scary and demoralizing to the troops. The Browning .30 calibers we had were good weapons, but fired no where nearly as fast. But we also had the Browning .50 BMG, which is still in use today, and has remained virtually unchanged since it was first produced in 1917, or 1919, I can't remember. I can't tell you about the Russian, or British weapons, except to say they were visually accurate. and they both had side arms and sub machine guns in the same caliber, and bolt action rifles in the .30 caliber range. Britain had the Lee Enfield, in .303 British, and the Sten sub machine gun in 9mm, and the Browning Hi Power side arm. They also had a lot of Thompsons, and 1911's from the lend/lease program. The Russians had a rifle called the Mosin Nagant, and it was a 7.62x54 round, and you can find a lot of those old rifles pretty cheap. I know not thing one about the Japanese weapons. As far as the game goes, what I do remember is, they reload quick. A trained soldier can reload pretty quick, he's trained to do so. But in the game, they all seem to be extremely well trained.