Actually there are lots of machine guns manufactured after 1986. All of them restricted, however. Google Post-Sample.The 'something else' that is going on is very very simple to understand. The gun owner stats are based on people possessing LEGAL guns. Factor in the illegal guns out there and your stats will make sense to any one with an IQ higher than a slice of Wonder bread.I would probably agree that population or population density might play a role. But look at this one:
New Jersey has the most gun owners per square mile of any state at 147 gun owners / sqmi. They also have the highest normal population density at 1189 people / sqmi. They are only ranked 21st in the country for gun murders at 2.8 per 100,000 people.
Louisiana on the other hand which is first in the country for gun murder rate with 7.7 per 100,000 people is 23rd for gun owner population density with 46 gun owners / sqmi and 24th for normal population density with 105 people / sqmi.
And New Mexico only has 5 gun owners / sqmi. Yet they rank 13th for gun murders with 3.3 / 100,000.
Not as tight a correlation as I might have expected. Still gotta say there must be something else going on.
"illegal guns"???? The only "illegal guns" I am aware of are fully automatic machine guns was manufactured after 1986. Do you suppose there are many of those in civilian hands in this nation?