Ken Hackathorn and Massad Ayoob go into the rise of the AR-15 as a home defense firearm since 1963 and tracks the parallels between Law Enforcement firearms for protection and everyday Civilian defensive firearms.
Massad goes into the “Pool Weapon” theory of home defense long guns and the facts that support the more widely usable AR-15 and similar firearms. A Pool Weapon needs to be usable by every person in the user pool from weakest to the strongest. The AR and similar carbines fit that need in a way shotguns and handguns cannot.
Thanks to Wilson Combat for producing and sharing.