M-16

Not long after it started selling M-16s to the military, Colt began marketing the semi-automatic AR-15 to civilians.

The legislation specifically bans several AR-15 style weapons by name. The weapons — semi-automatic variants of the M-4 and M-16 type weapons issued to US troops — have been used in a plethora of shootings in the past few years, including the October 27 attack on the Tree of Life synagogue.