Gun Control & RKBA

"In the absence of any evidence tending to show that possession or use of a "shotgun having a barrel of less than 18 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."

So, per the above paragraph, only military-type arms are allowed? Pass me my M-16, then, and thanks. An M-203 grenade launcher would be cool, too.