thats what I know about: under german occupation common citizen were be called upon to bring real guns to local collection points where they were stored. they could apply for a gun licence exspecially for small rimfire guns like flobert garden guns.
most of the hunting guns in 1940 were probably 12 and 16 ga double without any military value.
the german occupation force had no documents when gunownership was free and don't know who had what gun so it was only the threat of punishment that would bring people to the collection points. most man probably were bringing grandfathers old rusty hammergun to the german authoritys and hold the new pricy hammerless double in secret. anyway a lot of the guns were lost in the turmoil of the last war years.
also many people lost the money by the post war inflation. maybe not like it was in the pre war great depression but the money you hide under your bed lost real value. so in 1947 the production of a low price Mas 36 hunting rifle was an option.

if you compare pre war german, french and british gun catalogs they were all very similar and a rifle like the mannlicher schönauer was available everywhere.