The Courts have been consistent on this at least since 1939 (US vs. Miller). Unless the firearm in question "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 before you go off on the "we are all militia" road to nowhere, the Court also said in that decision that the Congress is charged "To provide for calling forth the Militia to execute the Laws of the Union, suppress Insurrections and repel Invasions; To provide for organizing, arming, and disciplining, the Militia, and for governing such Part of them as may be employed in the Service of the United States, reserving to the States respectively, the Appointment of the Officers, and the Authority of training the Militia according to the discipline prescribed by Congress."
Or are we all "States" too? Perhaps we're all "Congress"? Geez, there is NO Constitutional Right to Private Firearm Ownership! Got it? Good. Now, let's move on.
[link|http://www2.law.cornell.edu/cgi-bin/foliocgi.exe/historic/query=[group+307+u!2Es!2E+174!3A]!28[group+edited!3A]!7C[level++case+citation!3A]!29/doc/{@1}/hit_headings/words=4/hits_only?|Maybe this time will do the trick for the remaining doubters]
bcnu,
Mikem