Here is a suggestion for some features and ww2 weapons that could possibly make sense in dayz

-Introduce the 7.92x57mm european hunting cartridge to the game in order to add some of the german ww2 rifles and also more variety to weapons and gameplay.

-Tokarev SVT-40 russian ww2 semi-auto rifle with 10rnd magazine firing 7.62x54mm, for more pu-scope compatible rifles (while being inferior to the svd)

-Introduce german ww2 scope (zf42 for example) similar to pu scope in order to have similar gameplay as with mosin and sks currently

-K98k german bolt-action rifle in 7.92x57 mauser with zf42 optics attachment

-Gewehr 43 german ww2 semi-auto rifle with 10rnd magazine in 7.92x57 mauser, also compatible with german zf42 optics.

-Change Blaze to fire 7.92x57 mauser in order to add hunting scope rifle in the new caliber for more alternatives for the .308 cartridge

-Characteristics of 7.92x57mm should be almost identical with .308 and 7.62x54 with slight variety in accuracy, damage, flight time, rarity between the rounds.

-Possibly a modification option (using the toolbuilding maybe?) for mosin and K98k to mount modern optics for more viable bolt-action rifles in late game (also upgrading and maintaining your rifle throughout gameplay would add more survivalesque feel to the game)