It was at the beginning of April that the police raided a property in Skiftinge in Eskilstuna.
In a storage room, the police found weapons, weapon accessories and drugs.
The store owner was arrested the same evening, and stated in interrogation that he kept the goods for a friend, according to the preliminary investigation.
The friend was arrested later in July.
The two men are now being prosecuted on suspicion of a serious gun crime.
Also suspected of drug offenses
During the house search, the police also found cocaine, and therefore the two men are also charged with drug offenses.
A third person is also being prosecuted for the drug crime.
All three deny any wrongdoing.