did not protect an individual right.
Conspicuous from their dissent is if the 2nd does not protect an individual right as an enumerated right, then that right is protected as an un-enumerated right covered by the 9th Amendment.
All justices recognized that PA said:
A DECLARATION OF THE RIGHTS OF THE INHABITANTS OF THE COMMONWEALTH OR STATE OF PENNSYLVANIA 28 Sept. 1776
"That all men are born equally free and independent, and have certain natural, inherent and inalienable rights, amongst which are, the enjoying and defending life and liberty, acquiring, possessing and protecting property, and pursuing and obtaining happiness and safety."
And
"That the people have a right to bear arms for the defence of themselves and the state; and as standing armies in the time of peace are dangerous to liberty, they ought not to be kept up; And that the military should be kept under strict subordination to, and governed by, the civil power."
VT (1777) copied PA's constitution.
See Heller at
http://www.supremecourtus.gov/opinions/07pdf/07-290.pdf