The 1st Amendment is freedom of speech, the 2nd regards the right to bear arms. #2 was created by the Founding Fathers, in recognition that someday America will have at least one tyrant rising up. An monopoly on violence is one of the greatest powers a state can have over their citizens, so an armed citizenry is both a warning and an contingency: "Don't hurt us, and we won't hurt you."

Considering that abundance of arms in America, the opening of the Bullet Box would be very problematic for Trump and company.