Using the tenets of critical thinking, that is, reasoning without including emotion (sorrow and rage at the deaths of children; passion for guns that transcends compromise and resists regulation or denial of access to them in disregard for the risks they bring in unqualified hands) leads to these conclusions:
There is no legitimate civilian activity beyond recreational activities that requires weapons with the specific collected attributes of combat military small arms.
The lethal potential of such weapons in the hands of people who have access to them without having to pass through the military's filters of discipline, mental stability, a sense of responsibility and situation-determined use of such weapons limited only to armed combat or training for such combat, is and has been well demonstrated by the intended wanton murder of innocents.
The conclusion is that such weapons in such inappropriate hands in non-combat situations present an unnecessary risk to the public at large, substantiated by the numbers of deaths such inappropriate situations have resulted in.
Despite the cost of living, have you noticed how popular it remains?