Jem. I tried to save you the trouble of hunting down the relevant passages in the 64 page opinion by quoting them directly. which I did. You can find out what page they appear on by typing them into Google. The opinion is not going to mention specific brands, such as AR-15. You know that of course. Heller doesn't deal with banning of types of weapons. That is a separate issue and will result in a separate Supreme court case eventually. Heller was a case challenging whether a total ban in D.C., unless the firearm was disabled, violated Heller's second amendment rights. The court ruled that it did, and i certainly agree with the court. But at the same time Heller reiterates that the second amendment right does not extend to any firearm for any purpose, and leaves the door open to some future court deciding which types of firearms are protected. This is the precise point on which many gun enthusiasts go wrong. They mistakenly think that the second amendment right, with regard to firearms is unrestricted, ignoring that we have for many years banned private ownership of certain types of firearms, and the types banned could be expanded under both Miller and Heller. That's not changed one bit. What Breyer did in his dissent was to point out the illogic of using "in common use" as a criterion.
Even though there are millions of AR-15 sold in the U.S. -- about 4 million -- that number pales in comparison to the more than 300 million firearms in the U.S. Most of the assault rifles are in agency or police hands and most in private hands belong to gun enthusiasts, collectors etc. I would argue that they are not in common use, were I on the court. And aren't you glad I'm not!? IMO it doesn't matter and won't matter, as when this issue arrives at the Supreme court it is going to be decided mainly on other grounds. The common use argument will be only secondary and can easily be dispensed with. Let's say at least more easily than Scalia was able to jettison the Second Amendment's prefatory clause.