There are conflicts between Heller and US v. Miller (1939), but let's use the base argument to our advantage. If I were writing an appeal for the Maryland case, I would start with the existing precedent of Miller. The Miller decision states that a gangster's sawed-off shotgun is of no military value, and if it is of no military value to able bodied males between the ages of 17 and 45 [the militia definition found at 10 U.S. Code § 311(a)], then it is not protected by the 2nd Amendment, and as such is subject to regulation by the National Firearms Act. (so Miller would have went to Federal prison for having a short barreled shotgun and not paying the manufacturers tax for the NFA stamp, had he had not been killed otherwise; too bad the subject of WW I trench guns never came up
in spite of the fact two of the sitting justices were WW I vets).
Now the reason I bring this up is the Maryland case is in direct conflict with the established precedent from Miller, however flawed Miller may be. The judge's decision repetitively refers to "Common Use" which, per Miller, is the incorrect test. I would argue 'til I was blue in the face that the correct test would be whether the rifle is "of militia value" based upon the Miller precedent, regardless of the flaws in Miller. (Miller -"In the absence of any evidence tending to show that possession or use of a "shotgun having a barrel of less than eighteen inches in length" at this time has some reasonable relationship to the preservation or efficiency of a well regulated militia, we cannot say that the Second Amendment guarantees the right to keep and bear such an instrument. Certainly it is not within judicial notice that this weapon is any part of the ordinary military equipment or that its use could contribute to the common defense. " Id., at 178) By the very argument the state is using (too dangerous, kills too many people too quickly), the rifle, and it's high capacity ammunition feed devices, are clearly "of militia value". ( I would even argue this may be a chink in the armor of the NFA itself, if pressed with the right court
) The judge's comment that a Modern Sporting Rifle (I *HATE* the term Assault Weapon
) is dangerous and unusual just shows her personal bias against the black rifle / AR-15 platform. I would also argue that the High Cap Magazine ban also goes against Miller, when we have agreements with our allies on what magazine we will use (NATO STANAG 4179 - Oct 1980). If we agreed with NATO on the 30 round AR mag, wouldn't we want our militia to use it too?
The next issue for the judge is to establish whether there exists sufficient justification for a district court to break the stare decisis of a decided Supreme Court case. Miller, as imperfect as it is, is the standing case for what is, and what is not suitable "of militia value" to the Second Amendment. Until it is over turned, Miller is the established precedent and this case did not establish sufficient justification to break stare decisis..
Sooner or later the self defense right confirmed by Heller will have to be reconciled with the "militia / of militia value" rights confirmed by Miller. However as a disclaimer, I am not a lawyer, I do not portray one on TV, and I did not sleep at Holiday Inn Express last night.