Assault Rifle: 突击步枪。源于二战。特指自动步枪。
Assault Weapon: 美军的定义是机关枪，M249 Squad Assault Weapon。
Armalite Rifle(AR)：Armalite 是一家枪械制造厂。AR-15是他们的设计。倒楣的是AR
-15的缩写跟Assault Rifle的缩写一样。
80年代，左派政客首先把Assault Weapon引进民用枪支范畴。特指某些外形类似
Assault Rifle的半自动步枪。AR-15是主要目标。然后通过混淆Assault Rifle和
Assault Weapon的字眼，挑起民间对半自动的恐惧。
以下摘自一个禁枪组织的文件：
The weapons' menacing looks, coupled with the public's confusion over fully
automatic machine guns versus semi-automatic assault weapons—anything that
looks like a machine gun is assumed to be a machine gun—can only increase
the chance of public support for restrictions on these weapons. http://www.vpc.org/studies/awaconc.htm
