First a little bit about the rifle itself. It fires the 7.92×57mm Mauser cartridge, which is also used in the Kar98 or MG42 for example. It's a big bullet and it makes a big bang.
While it had a sophisticated muzzle break and a unique recoil dampening spring in the stock, it's not ideal for sustained fire. The gun is not heavy enough to control the recoil of the powerful cartridge.
That said, the FG42 ingame sounds quite weak and muffled, with a continuous high rate of fire - something you would expect from a low caliber SMG.
This honestly bugs me more than i like to admit, to the point where i can't enjoy the Fallschirmjäger unit to the fullest. The rest of the weapon audio sounds like a wet dream (they even beefed up the 5cm sound of the Puma) albeit the MG34 is maybe also more on the wimpy side, but still.
So, do you like the new FG42 sound?
Some old folks may remember the previous FG42 sound from vCoH, which sounded more bassy, slower and in my opinion more representative. Shit, now i sound almost like HS King.