Finkelstein:
Keep in mind that people could still use Shot guns or hunting rifles to protect themselves if found it necessary.
Whose bullets can be more powerful than the AK or AR bullets. A shotgun can release 9-15 Double Ought buckshot (OO) in a single pull of the trigger. That's the equivalent of 3-5 9mm bullets in a single burst.
Also, a tubular fed shotgun can have its capacity extended to 7 or 8 shells depending on their barrel length. That could give you the equivalent of 21-25 handgun cartridges.