I'm still in the process of unlocking all the weapons (again) where my favorite builds were:

Legacy favorite:
M1 Garand / scoped
M1A1 / aperture sight
overkill, irons lungs, betty



For now:
M1 Garand scoped w/stopping power, deep impact, betty
&
MP40 / aperture sight
stopping power, deep impact, bomb squad
&
SVT, scope (which i like that its not a full blown scope like the sniper rifles), stopping power, deep impact, betty

i don't have a favorite gun yet but my favorite perk is second chance

FG42 with iron or scope with slight of hands deepimpact and bandolaier

M1 scoped...

ok......
you know im gonna say betty's betty's and more betty's.....
if im not winning with my ariasaka (cant spell) with bayonet, betty's, juggernaught, 2nd chance then I usually go with gerand or gewrehr with nade launcher, juggernaught and deep impact.
but I do like playing with all the guns just for a bit of mixing up.....its fun and all good!!!

SVT 40(with flash hider) Deep Impact,Stopping Power, Bandolier

I'm only at level 42 right now... I have two fav loadouts

1 - BAR with sleight of hand, deep impact and betty's

2 svt with telescopic sight, juggernaught and 2 betty's

I occasionally pick up a grand with a tele on it, and quite like that too!