"Assault rifle" is a technical term from the firearms lexicon referring to a class of select-fire rifles which fire an "intermediate" cartridge. It is a translation of the German word "das Sturmgewehr" from "stürmen" (or "stuermen" if your computer cannot make the German u umlaut) which is a verb meaning "to storm" combined with "Gewehr" meaning rifle. (The Germans have a habit of making new words by simply combining lots of old words. Their word for "ceasefire negotiations" is "Waffenstillstandunterhandlungen.") There might be a little quibbling around the edges about whether a certain rifle fits into this category, but this definition is accepted by the designers, manufacturers, and buyers of rifles. "Assault rifle" has never included pistols or shotguns.
"Assault weapon" is a politico-legal word with no technical meaning which first mades it appearance in 1985. The gun controllers themselves cannot offer a clear and concise techincal meaning of the term. The US Congress took a vote in 1994 and decided by simple to define "assault weapon" at Title 18, Chapter 44, Section 921 of the US Code. which you can read here.
http://www.awbansunset.com/whatis.html
Seven states have enacted bans against "assault weapons," with each state having its own definition. The states are California, Connecticut, New Jersey, Hawaii, New York, Massachusetts, and Maryland.
California's initial attempts to ban "assault weapons" was so poorly worded that local law enforcement had no idea what weapons were covered. California's current definition of "assault weapon" which you can read
here. In 1990 the New Jersey legislature enacted an "assault weapon" ban that included low-power .22 rifles, and even BB guns. In response, Deputy Police Chief Joseph Constance of Trenton, New Jersey stated: "Assault weapons are used in an underwhelming .026 of 1 percent of crimes in New Jersey. This means that my officers are more likely to confront an escaped tiger from the local zoo than to confront an assault rifle in the hands of a drug-crazed killer on the streets." New Jersey gun owners found out that many rifles or carbines designed to accept a detachable magazine of more than 15 rounds, owners of shotguns which could hold over six rounds, and owners of handguns which were designed to accept a magazine over 17 rounds learned that they owned "assault weapons."
It appears that when gun control advocates use the term "assault weapon," it means just about any weapon that looks mean. The lack of technical definition makes “assault weapon†an elastic category that can expand or contract faster than Oprah's waistline. A case in point is the Johns Hopkins University Center for Gun Policy and Research, which specializes in this type of pseudo-science. See their
Factsheet: Assault Weapons. Also, check out this propaganda from the
Educational Fund to Stop Gun Violence. These people state that "any gun with the ability to accept a detachable magazine satisfies the 'high capacity' component of the 'assault weapon' definition."
"Assault weapon" is like another propaganda word, "gateway drug."
For more info, see
http://www.armedfemalesofamerica.com/sightingin/AWresources.htm