i dunno about the MG 42 have yous seen the rate of fire (of course you have) now divide that by 60..... lot o bullets spat out in 1 sec. not sure my shoulder could take the kick
It's just all German or Allied weapons isn't it...as if the Soviet Union wasn't there at all. Speaking realistically, I'd just get what I was issued, which would probably be a TT pistol and a PPSh 41 (if it was 1941), then with the development of the PPSh modification I'd just grab the PPSh-43 along with a kitchen knife or a penknife from home, and go stand for Soviet ground and never surrender.
I would use a Camera....with it, I could take a picture that would influence opinions, leading to further recruitment/desertion. If the picture was good enough and given wide circulation, my contribution to the war effort would far outweigh anything I might have done with something that went bang.....
Okay so I noticed in the question it did not specify "personal firearm" so if I could have wielded any one specific weapon in WWII it would have to be an Essex class US aircraft carrier.
Up until the early 1980s, I have used a M3 Grease gun and .45cal M1911A1 pistol. Once the US Army went to the 9mm, those relics went away.
I would use the Browning M2 50 cal or fg42 but I think the easiest to shot is the m1 carabine! Nothing would be able to cross the street in front of my balcony
My Grandpas ShotGun Know as a Trench Gun for CCC or Jungle Warfare or very wooded area great weapon to have Google Image Result for http://i530.photobucket.com/albums/dd346/drm2m/DSC09424.jpg It's to be Noted I have the proper Pouches for my 3" OOO buck Mag Shells! Yes I do know this Bad Girl can't Handel 3", but Mine does!
Personally, I would wield a 1942 model Smith-Corona typewriter, preferably in a newspaper office in Kansas.
The mp41. A good reliable accurate weapon, with plentiful ammo. For some more range a k98 with iron sights. Oh and a bren.