The 1938 German Weapons Act, the precursor of the current weapons law, superseded the 1928 law. As under the 1928 law, citizens were required to have a permit to carry a firearm and a separate permit to acquire a firearm. But under the new law:

Gun restriction laws applied only to handguns, not to long guns or ammunition. The 1938 revisions completely deregulated the acquisition and transfer of rifles and shotguns, as was the possession of ammunition."[3]
The legal age at which guns could be purchased was lowered from 20 to 18.[4]
Permits were valid for three years, rather than one year.[4]
The groups of people who were exempt from the acquisition permit requirement expanded. Holders of annual hunting permits, government workers, and NSDAP members were no longer subject to gun ownership restrictions. Prior to the 1938 law, only officials of the central government, the states, and employees of the German Reichsbahn Railways were exempted.[3]
Manufacture of arms and ammunition continued to require a permit, with the revision that such permits would no longer be issued to Jews or any company part-owned by Jews. Jews were consequently forbidden from the manufacturing or dealing of firearms and ammunition.[3]
Under both the 1928 and 1938 acts, gun manufacturers and dealers were required to maintain records with information about who purchased guns and the guns' serial numbers. These records were to be delivered to a police authority for inspection at the end of each year.

-- Nazis actually greatly reduced firearms control.