what I know are the same for parts
Buttstock assemblies
Triggers and trigger springs
Bolt catch roll pin (Armalite Style only)
Hammers and hammer springs
Pistol grips (a spacer may be needed for certain models)
Receiver extension (Buffer Tube)
Disconnector and disconnector spring
Buffer detent
Magazine release buttons and springs
Safety selectors
Now go by the Führer Healey wayGuidance:
A weapon is a Copy or Duplicate and is therefore a prohibited Assault weapon if it meets one or both of the following tests and is 1) a semiautomatic rifle or handgun that was manufactured or subsequently configured with an ability to accept a detachable magazine, or 2) a semiautomatic shotgun.3
Similarity Test: A weapon is a Copy or Duplicate if its internal functional components are substantially similar in construction and configuration to those of an Enumerated Weapon. Under this test, a weapon is a Copy or Duplicate, for example, if the operating system and firing mechanism of the weapon are based on or otherwise substantially similar to one of the Enumerated Weapons.
Interchangeability Test: A weapon is a Copy or Duplicate if it has a receiver that is the same as or interchangeable with the receiver of an Enumerated Weapon. A receiver will be treated as the same as or interchangeable with the receiver on an Enumerated Weapon if it includes or accepts two or more operating components that are the same as or interchangeable with those of an Enumerated Weapon. Such operating components may include, but are not limited to: 1) the trigger assembly; 2) the bolt carrier or bolt carrier group; 3) the charging handle; 4) the extractor or extractor assembly; or 5) the magazine port.
If a weapon meets one of the above tests, it is a Copy or Duplicate (and therefore a prohibited Assault weapon), even if it is marketed as “state compliant” or “Massachusetts compliant.”
The fact that a weapon is or has been marketed by the manufacturer on the basis that it is the same as or substantially similar to one or more Enumerated Weapons will be relevant to identifying whether the weapon is a Copy or Duplicate (and therefore a prohibited Assault weapon) under the applicable test(s).
Under Section 121, the Features Test in the former 18 U.S.C. section 921(a)(30) remains an independent basis for qualification as an Assault weapon.
If a weapon, as manufactured or originally assembled, is a Copy or Duplicate under one or both of the applicable tests, it remains a prohibited Assault weapon even if it is altered by the seller. Therefore, a Copy or Duplicate will be treated as an Assault weapon even if it is altered, for example, by pinning the folding or telescoping stock in a fixed position, by removing the pistol grip, by removing a bayonet mount or flash suppressor, or by preventing the weapon from accepting a detachable magazine.
Purely cosmetic similarities to an Enumerated Weapon, such as finish, appearance, or shape of the stock, or appearance or shape of the rail, will not be treated as relevant to a determination of whether a weapon is a Copy or Duplicate.
The way this thing is worded just being a Direct Gas Impingement system is enough for her to call it a banned weapon. I would think if the AR10 was a safe bet for dealers it would have been on the shelves by now in droves.