Bu according to the supreme court, neither is a sawed-off shotgun.
The Supreme Court was mistaken.
Since Wiki seems acceptable here:
(bolding mine)http://en.wikipedia.org/wiki/United_States_v._Miller said:On March 30, 1939 the Supreme Court heard the case. Attorneys for the United States argued four points:
1. The NFA is intended as a revenue-collecting measure and therefore within the authority of the Department of the Treasury.
2. The defendants transported the shotgun from Oklahoma to Arkansas, and therefore used it in interstate commerce.
3. The Second Amendment protects only the ownership of military-type weapons appropriate for use in an organized militia.
4. The "double barrel 12-gauge Stevens shotgun having a barrel less than 18 inches in length, bearing identification number 76230" was never used in any militia organization.
Neither the defendants nor their legal counsel appeared at the U.S. Supreme Court.
On May 15, 1939 the Supreme Court, in a unanimous opinion by Justice McReynolds, reversed and remanded the District Court decision. The Supreme Court declared that no conflict between the NFA and the Second Amendment had been established, writing:
"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."
And further along:
Wiki said:Some argue that fundamental issues related to the case were never truly decided because the Supreme Court remanded the case to the federal district court "for further proceedings", which never took place -- by the time of the Supreme Court decision, Miller had been killed, and Layton made a plea bargain after the decision was handed down, so there were no claimants left to continue legal proceedings.
Subsequent rulings have been allowed to stand, indicating that short-barreled shotguns are generally recognized as ordinary military equipment if briefs are filed (e.g., see: Cases v. United States, 131 F.2d 916, 922 (1st Cir. 1942), describing use of short-barreled shotguns in specialized military units.)