WASHINGTON (AP) — Even in its heyday, the statistic wasn't the kind you could count on.
A finding that 30 percent to 40 percent of guns changed hands outside the background-check system was, at best, a rough guide post in the murky gun-ownership universe.
At least it was fresh.
Now it's old and surely very tired. But President Barack Obama, some Democratic lawmakers, a coalition of mayors and others arguing for expanded background checks won't let that statistic rest in peace.
To hear them talk, you'd think it was born yesterday, rather than 20 years ago.
OBAMA, on Jan. 16: "It's time for Congress to require a universal background check for anyone trying to buy a gun. The law already requires licensed gun dealers to run background checks.... But it's hard to enforce that law when as many as 40 percent of all gun purchases are conducted without a background check."
MAYORS AGAINST ILLEGAL GUNS, a coalition favoring tighter gun controls, on Tuesday: "Around 40 percent of U.S. gun transfers are conducted by unlicensed 'private sellers' who are not required to conduct a federal check, and who often do business at gun shows and on the Internet."
NEW YORK MAYOR MICHAEL BLOOMBERG, Dec. 17: "Congress should pass the Fix Gun Checks Act, which would close the 'private sale loophole' that allows more than 40 percent of gun sales to go through without a background check."
REP. DAVID CICILLINE, D-R.I., Jan. 26: "More than 40 percent of sales nationally are made without background checks."
VICE PRESIDENT JOE BIDEN, Jan. 17: "Because of the lack of the ability of federal agencies to be able to even keep records, we can't say with absolute certainty what I'm about to say is correct. But the consensus is about 40 percent of the people who buy guns today do so outside the ... background check system."
Biden stands alone here in acknowledging he may be saying something that isn't right.
A 1996 law pushed by the gun-rights lobby closed the spigot on federal gun research, leaving scholars, private groups and states to pick up some pieces. Only now, under a recent order by Obama, can federally financed research resume.
So it's no wonder policymakers are grasping at shreds of moldy data. But they're not owning up to the true vintage of their information or the shortcomings that made it questionable at the time.
The claims that gun sales made without background checks comprise "more than," ''as many as," ''nearly" or "about" 40 percent of all gun sales are rooted in a poll looking broadly at gun ownership in America. Sponsored by the Justice Department through a grant to the Police Foundation, the poll's principal relevance today is as a snapshot of the way things were when it was taken, namely 1994.
The research reported on the nature of gun acquisitions made in 1993 and 1994, asking people who had obtained guns then where the guns had come from and whether they thought the source was a federally licensed dealer. Transactions through licensed dealers were considered covered by the background check system, which was just then coming into effect.
Although the survey interviewed more than 2,500 Americans, just 251 had acquired guns during that time frame, a small sampling from which to make a general conclusion.
In all, 64 percent of those respondents reported acquiring a gun from a source they thought to be a licensed dealer, suggesting that 36 percent of gun acquisitions were in the secondary and unregulated market.
But the study's researchers found considerable ambiguity and some apparent contradictions in the responses. The poll relied, in part, on people's best guess about whether a seller was licensed.
With a clear picture eluding them, the researchers estimated 30 percent to 40 percent of the acquisitions were off the books and would not have been subjected to a background check.
Only 4 percent of gun sales were thought to have come through gun shows or flea markets. That's just a corner of the market, but a main concern today for those who want to expand background checks to close the "gun-show loophole," as Obama's proposals would do.
More than 17 percent of guns acquired in 1993 and 1994 came from a family member, according to the poll. This source of weapons would remain largely unregulated in pending Senate legislation calling for expanded checks.
Discounting family acquisitions, the percentage of gun transactions eluding background checks would be considerably less.
In contending that 40 percent of gun transfers are conducted by private sellers, often "at gun shows and on the Internet," the mayors stretched a thin claim even thinner in their statement Tuesday.
They cited the same old study as everyone else, one done well before the spread of online commerce. The study considered purchases by mail order, 3 percent of reported gun acquisitions, but makes no mention of online transactions.
AP Polling Director Jennifer Agiesta and Associated Press writer Alan Fram contributed to this report.
Police Foundation Guns in America survey: http://www.policefoundation.org/content/guns-america