Anyway my story is set just before American entry to WWII. The MC is a single male who lives in the rocky mountain area with his hunting dog. He is quite well off due to inheriting a rather small fortune from his passing uncle.
Excuse me I am drinking and trying to type at the same time and I dont have a designated tipper
Any way he is thrust into a world where legend is fact. He has to choose between a mortal life and a immortal one. There is a war with in the immortals who want the old ways back where humans are their servents etc..

What sort of weapons will they be using? And if fire arms what kind.
Of curse the fire armes would be what is advable at the time. Defiantly the M1903, and the K98 Mauser, but what elts would they be using?
My knowledge of firearms of this time is limited to military small arms.

Who among you knows?

Rommel Fenrir Wolf II

Well if he is an American he would probably be partial to American weaponry, so I'd avoid the Mauser.

For handguns the .45 caliber M1911A1 was pretty much it, there were some revolvers in use, but this was the sidearm of choice. Many soldiers procured broomhandle Mausers from the Nazi officers corpses and POW's, it was a very desirable trophy.

For longarms you had only a few options. The primary long arm was the M1 Garand, a semi-automatic, using an .30 caliber 8 round strip clip. The carbine was introduced a little later, using a proper magazine. The bolt action Springfield M1903 was used as a Sniper rifle, also in .30 caliber. For close range action the .45 caliber Thompson sub-machine gun was used, also known as the Tommy Gun, or by soldiers as the Trench Broom, guess why :-)

Because of the quantity of the M1903's they were used at the beginning of the war, but were phased out and replaced by the Garand as the war progressed.

That is a VERY brief overview, but those are the primary US weapons of the period.

Early war, Springfield M1903 and Garand M1, middle of the war Garand M1 and a M1903's that are being phased out. For close combat the Thompson SMG. For sidearms the Colt .45.

For squad level, you had the Browning M1919 Machine Gun, it was an air cooled .30 caliber, that continued to serve up until the 1990's (though it was refitted to .762mm after ww2).

Pistol wise it was the Colt .45, though the Browning p35 or High Power was also in use, ironic since they were both designed by John Browning. For Axis the Luger and Mauser were most typical.

For SMG's the US soldiers pretty much had the Thompson, due to costs this was later replaced by the M3 Grease gun, basically the same weapon stripped down and simplified.

I would add the Browning M2 .50 caliber machinegun, adopted in the 1920s.

Bazookas and rifle grenades were dormant development projects until the US got into the war and were deployed in 1942/43. Those would be outside your time parameter.

Artillery, in 75mm, 105mm and 155mm (3-, 4- and 6-inch) howitzers, were standardized in the 20s and 30s. A 75mm (3-inch) gun was also used for anti-aircraft. They were all towed until self-propelled versions were made during the way. Rockets were around, but not deployed pre-war.

Mortars in 60mm, 81mm and 4.5-inch sizes were available before the war.

For tanks, look at the Stuart Light tank M2 and Grant Medium tank M2. Both progressed to higher M- models early in the war, but pre-war models are what you're after.

The Winchester model 1894 would be the most likely, and or a similar period Remington shotgun. The Winchester was very popular throughout WWI and the interwar period. It's the biggest selling rifle of all time.

It is quite odd that things like that happen…

Anyway I know of the military weaponry of the time, I am a proud owner of a few pieces, M1903A3, M1 Garand, and K98Mauser. I use to have a BAR in 7.62, but my friend and I sold it.

And getting your hands on military weaponry quite easily, so I think they would be using a mixture of military and civilian weaponry in this little (BIG) war they would be having.

I don’t know much of civilian firearms.

Tango Mike.