Militiamen should only carry a rifle with a full battle load ready to fight gun confiscation not to a demonstration.
Remember how police with rifles shot 9 bikers dead and wounded 18 in Waco for drawing pistols.
from https://en.wikipedia.org/wiki/2015_Waco_shootout
"Witness William English, a former U.S. Marine and Iraq war veteran, reported the firing of small caliber rounds, followed by "a rapid succession of shots from what sounded to me like an assault rifle”; Steve Cochran, a Navy veteran and Sons of the South club member stated that he heard one pistol shot, rest of the shots coming from "assault rifles... the shootout began with a small number of pistol shots, and was then dominated by semiautomatic weapons fire. Only one semiautomatic rifle was confiscated from a biker, which was in a locked car. The police had semiautomatic weapons."

At every major demonstration the feds are set up at strategic concealed locations with video cameras identifying participants.