This source sheet contains both sources that caution against the ownership or use of dangerous weapons and those that encourage the use of weapons in self-defense.
In reading through the sources, I'd like you to consider the following question:
What kinds of public policy initiatives (restricting weapons, promoting weapons, or both) could these sources shape that would most likely and most quickly lead to a society with less, rather than more, targeted violence towards religious institutions, schools, and public gatherings.
Variants of the phrase "be very careful," are found three times in Deuteronomy. Read together with a command to build a wall around a flat roof, they caution that you should not have potentially dangerous objects in your home.
This next set of sources speak positively about the use of weapons for saving or protective lives.