As a Christian I have given that matter a lot of thought myself. While it's true that the Apostle Paul tells us that God commands us to obey the laws of the land where we live whether we think they are fair and just or not, I believe that it is also true that the U.S. Constitution is the supreme law of the USA and overrides any and all conflicting laws that may be enacted by Congress or the individual states and local authorities. After having considered the matter from both sides of the question as objectively as my admitted prejudices allow, I have come to the conclusion that overly restrictive laws, including gun laws, that exceed constitutional limits on government's delegated powers are not binding on Christians or non-Christians, although as a practical matter we may suffer unjust penalties for breaking those unconstitutional laws.
After considering all facets of the situation as best I understand the biblical mandate to obey man's law and the matter of government's intrusion on the people's rights protected by the supreme law of the land, I have no compunction about disobeying laws that are in blatant conflict with the Supreme Law of the United States that defines and protects some but not all of our God-given rights. One such right is the right to keep and bear arms which has providentially been affirmed by a U.S. Supreme Court decision that resolves the controversy concerning the original intent of the authors. From now on, unless I am shown proof that I am wrong in my conclusion about the supremacy of the Constitution over conflicting laws I do not consider disobedience to laws and regulations contrary to the 2nd Amendment to be a violation of God's commandment to obey even the unjust laws of the land.
I am open to further discussion and consideration of differing opinions on the issue if anyone else has arrived at a conclusion or is in the process of deciding the matter for himself or herself.
If all are obliged to obey the laws of the land, just or not, then Moses had no cause to say "Let my people go".
And there was certainly no reason to kill all the first-born to force the issue.