Here's some background from The Straight Dope on gun controls in Germany:

Stalin's work in the gun controlled Soviet Union.

Hitler's work in gun controlled Germany.

Here's some background from The Straight Dope

1935 "has no correlation with any legislative effort by the Nazis for gun registration." (Nor, for that matter, does 1936...) Indeed, there was no need for the Nazis to pass a law like that, because the earlier Weimar government had already passed gun registration laws. When I asked [Clayton] Cramer [author of Firing Back] about his research, he said, "The laws adopted by the Weimar Republic intended to disarm Nazis and Communists were sufficiently discretionary that the Nazis managed to use them against their enemies once they were in power." In other words, they didn't need to pass additional laws. The Nazis did pass a weapons law in 1938, but that only added restrictions to the previous law, especially for Jews and other "non-citizens."[...]

Cramer further noted that although gun control laws helped the Nazis suppress political dissidents and round up German Jews for extermination, "they weren't the major part of the process." Later, when they invaded Eastern Europe, Cramer says the Nazis did indeed benefit from the inability of their victims to fight back. [...]

Cramer says the Nazis did benefit significantly from gun control in Eastern Europe in terms of "the inability of their victims to fight back." He cites The Holocaust, a book by Leni Yahil (translated by Ina Friedman and Haya Galai, Oxford University Press, 1990), which has a chapter discussing armed resistance by Jews, including rebellions with just a few firearms and a lot of courage. In addition, he talks about Israel Guttman's book, Resistance: The Warsaw Ghetto Uprising, which discusses the difficulty the Jews faced in obtaining weapons.

Cramer believes that "if the population of Eastern Europe were as well armed as the average American, the Nazis would have lost much of their military capacity attempting to implement the Holocaust." Here's what occurred after 1937, according to the Constitutionalist:

Nazi Weapons Act of 1938 (Translated to English)

• Classified guns for "sporting purposes".
• All citizens who wished to purchase firearms had to register with the Nazi officials and have a background check.

• Gave Nazis unrestricted power to decide what kinds of firearms could, or could not be owned by private persons.

• The types of ammunition that were legal were subject to control by bureaucrats.
• Juveniles under 18 years could not buy firearms and ammunition.

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A Gun Control Law Passed by the German Government One Day After Kristallnacht

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1573

Regulations Against Jews' Possession of Weapons

11 November 1938

With a basis in §31 of the Weapons Law of 18 March 1938 (Reichsgesetzblatt I, p.265), Article III of the Law on the Reunification of Austria with Germany of 13 March 1938 (Reichsgesetzblatt I, p. 237), and §9 of the Führer and Chancellor's decree on the administration of the Sudeten-German districts of 1 October 1938 (Reichsgesetzblatt I, p 1331) are the following ordered:§1
Jews (§5 of the First Regulations of the German Citizenship Law of 14 November 1935, Reichsgesetzblatt I, p. 1333) are prohibited from acquiring, possessing, and carrying firearms and ammunition, as well as truncheons or stabbing weapons.  Those now possessing weapons and ammunition are at once to turn them over to the local police authority.
§2
Firearms and ammunition found in a Jew's possession will be forfeited to the government without compensation.
§3
The Minister of the Interior may make exceptions to the Prohibition in §1 for Jews who are foreign nationals.  He can entrust other authorities with this power.
§4
Whoever willfully or negligently violates the provisions of §1 will be punished with imprisonment and a fine.  In especially severe cases of deliberate violations, the punishment is imprisonment in a penitentiary for up to five years.
§5
For the implementation of this regulation, the Minister of the Interior waives the necessary legal and administrative provisions.
§6
This regulation is valid in the state of Austria and in the Sudeten-German districts.
Berlin, 11 November 1938
Minister of the Interior
Frick

 A brief history of the Soviet Union under Stalin.

The imagery is horrific in Nature, this is what happens when People are disarmed. So tell me who is giving up what today? Rest assured I will not be standing in line with you, that much I can guarantee.