Just some gun, crime and population musings:
81.4 Million Gun Owners In The US:
https://americangunfacts.com/gun-ownership-statistics/
Guns used defensively btwn 500K - 3Mx per year:
https://www.heritage.org/firearms/commentary/why-these-defensive-uses-firearms-should-disarm-second-amendment-skeptics
Population 330M. Under 18 22%. Therefore adults = 257.4M
https://www.census.gov/quickfacts/fact/table/US/PST045221
So, on the low end: 81M divided by 500K is .6% of gun owners using a gun annually for defensive reasons. So, in a 10 year time frame, you've cycled through 6% of gun owners; which are really only 30% of the adult population (approx).
Presumably, if the other 17M adults owned a gun, it would stand to reason that guns could be used defensively another 1.5M times (at the low end) and on the high end 9M+ times per year on the high end.