ar fire selector switch question
a friend and i were at the range and met this guy who was shooting his ar, it was all tricked out. on his fire selector switch was this thing that when you pushed it forward it made the trigger pull really light, he told us what it was called but we cant remember what it was. it was just like any other fire selector switch with a safe, fire selection but if you pushed it forward past the fire position it set the trigger so that it was really light. does anyone know what this might have been?