Maximum Gun Purchase Age?

In an otherwise responsible article about the claim that mass murders fell during the assault weapons ban 2/17/22 Newsweek:

"A recent Newsweek poll found a majority of Americans agree that there should be a maximum age for purchasing firearms, although respondents did not agree on the limit.

The poll—conducted between January 28 and 29 among a sample of 1,500 eligible U.S. voters—found 52 percent of respondents supported the imposition of a maximum age requirement for the purchase of firearms.

Among these, 20 percent of respondents thought the age limit should be set at 60, while 16 percent said that it should be set at 70."

So too young to buy a gun and too old?