The man believed that he had obtained the weapons legally but was unsure whether they had been properly deactivated.
Police inspected both weapons and found that they had been rendered harmless, but the methods used to deactivate them were not entirely in keeping with current law. The owner was allowed time to fix those issues so that he could keep the weapons.
It is astounding that the former Soviet Block is freeer than the US with regards to keeping and bearing arms.
Did you miss the part about all weapons having to be "documented", i.e. registered?