What we are dealing with are military-substitute weapons. Which are fine, because those are precisely what the 2nd Amendment was designed to protect!
Let's deal with the reality as it exists. "Assault weapon" has become the established terminology. We should embrace "weapons of war." Those are our birthright. Not "sporting weapons." The 2nd Amendment is not about hunting or target shooting.
And the term "military grade weapon" has been used too.
It's interesting how "terminologies" the antis chose to use over the decades as knives, axes, revolvers, lever actions, bolt actions and shotguns have been used for war so they are also "weapons of war, military grade weapons and assault weapons".
But what ultimately matters is what "terminologies" the Supreme Court chooses to use and this is from judge Kavanaugh, now justice Kavanaugh of his dissent in Heller II -
https://reason.com/volokh/2018/07/09/judge-kavanaugh-and-the-second-amendment/
There is no meaningful or persuasive constitutional distinction between semi-automatic handguns and semi-automatic rifles. Semi-automatic rifles, like semi-automatic handguns, have not traditionally been banned and are in common use by law-abiding citizens for self-defense in the home, hunting, and other lawful uses ... A ban on a class of arms is not an "incidental" regulation. It is equivalent to a ban on a category of speech.
In the recent Supreme Court's Bruen ruling, justice Thomas used historic terminologies of "arm, weapon and firearm" while using "modern arms" and "modern firearms" referencing
Caetano v. Massachusetts (Page 19-20 of ruling) -
https://www.supremecourt.gov/opinions/21pdf/20-843_7j80.pdf
And justice Thomas also wrote, "The constitutional right to bear arms in public for selfdefense is not 'a second-class right'" meaning just as First Amendment protection applies to "modern" forms of communication, Second Amendment protection applies to "modern" types of firearms.
In
Miller v Bonta (CA assault weapon ban case) ruling, judge Benitez wrote -
https://s3.documentcloud.org/documents/20798017/ruling-in-miller-et-al-v-bonta-et-al.pdf
... the popular AR-15 rifle is a perfect ... home defense weapon and homeland defense equipment. Good for both home and battle, the AR-15 is the kind of versatile gun that lies at the intersection of the kinds of firearms protected under District of Columbia v. Heller ... State of California makes it a crime to have an AR15 type rifle. Therefore, this Court declares the California statutes to be unconstitutional ... California’s complex definition of the ignominious “assault weapon.” (Page 1)
... the “assault weapon” epithet is a bit of a misnomer. These prohibited guns, like all guns, are dangerous weapons. However, these prohibited guns, like all guns, can be used for ill or for good. They could just as well be called “home defense rifles” or “anti-crime guns.” (Page 8)
And judge Benitez used the term "Modern Rifle" (Page 10) compared to "Traditional Rifle" (Page 15):
The Second Amendment protects modern weapons. Caetano v. Massachusetts, 577 U.S. 411, 412 (2016). The firearms banned by California Penal Code § 30515 and deemed “assault weapons” are modern weapons. They are principally AR-15 type rifles ...
AR-15 platform in particular, is an “open source” design and includes firearms made by numerous manufacturers under different product names with countless variations and adaptations ... When the term “modern rifle” is used in this opinion, it principally refers to a rifle built on the AR-15 platform with prohibited features. (Page 11)
In Caetano ... common modern arms useful for selfdefense in the home ... Second Amendment protection includes both common arms and weapons that may also be useful in warfare. (Page 12)
The Heller Test ... The overwhelming majority of citizens who own and keep the popular AR-15 rifle and its many variants do so for lawful purposes, including selfdefense at home. Under Heller, that is all that is needed. Using the easy to understand Heller test, it is obvious that the California assault weapon ban is unconstitutional. Under the Heller test, judicial review can end right here. (Page 13)
... a ban on modern rifles has no historical pedigree. Prior to the 1990’s, there was no national history of banning weapons because they were equipped with furniture like pistol grips, collapsible stocks, flash hiders, flare launchers, or barrel shrouds. In fact, prior to California’s 1989 ban, so-called assault weapons were lawfully manufactured, acquired, and possessed throughout the United States. (Page 19)
In the end, the Court finds that the prohibited features do not change an AR-15 rifle from a benign weapon into an “incredibly effective killing machine.” Another commonly espoused myth is that the caliber of these centerfire semiautomatic weapons are more lethal. In fact, the evidence proves otherwise. The usual ammunition for an AR-15, the .223/5.56 round, is designed to cause wounding, much more than death. Dr. Margulies, M.D., testified that the 5.56 round was a NATO choice to inflict non-lethal wounds. (Page 43)