I need to know if the supreme court had a complete decision on the United States v Miller case. If so , why did they decide as they did?

It is a controversial decision because both sides of the gun control issue say it supports their cause.Gun control advocates point to the precedent of Miller in rejecting legal challenges to federal firearm regulation. Gun rights advocates interpret it to state that ownership of weapons for efficiency or preservation of a well regulated militia is protected by this decision.The decision was 8-0, with Justice Douglas abstaining.