James D. Wright and Peter Rossi, "Armed and Considered Dangerous", (Aldine 1986, 2nd ed 2008, ISBN-13: 978-0202362427), US NIJ Felon Survey of 1,874 convicts who had committed armed crimes and were serving time in 18 prisons in 10 different states. A link to the author's summation:
http://www.rkba.org/research/wright/armed-criminal.summary.html
Wright & Rossi were hired by the Carter Admnistration to investigate links between guns and violence in 1977 and published their first study in 1981 which became the book "Under the Gun" (Aldine 1983 1st ed). Wright, Rossi and Kleck are all noted for being political liberal, originally true believers in gun control until their research made them skeptical.
Propaganda is just that...doesn't matter which side it comes from.
It was not Kleck & Gertz who claimed "guns stop crime 2.4 million times per year"; they and the other defensive gun use surveyors do make the claim guns are used defensively from 108,000 to 4,700,000 times per year.
The Kleck and Gertz study was presented at the Guns and Violence Symposium at Northwestern University, School of Law, after being vetted around at several gatherings of criminologists for comment and criticism.
Kleck & Gertz gave their methodology and their data to academic peers for review and discussion. You don't do that if you are fabricating partisan propaganda.
Gary Kleck and Marc Gertz, "Armed Resistance to Crime: The Prevalence and Nature of
Self-Defense with a Gun", 86 J. Crim. Law & Criminology 150 (1995)
aka National Self Defense Survey (NSDS) of 1994. A transcription in html has been posted at GunCite as
http://www.guncite.com/gcdgklec.html but it is originally a peer reviewed academic article published in an established journal
Journal of Criminal Law and Criminology,
It even sparked an article "A Tribute to a View I Have Opposed," by Marvin E. Wolfgang, starting on page 188 of the conference issue dedicated to the symposium. Wolfgang openly had declared "If I were Mustapha Mond of Brave New World, I would eliminate all guns from the civilian population and maybe even from the police. I hate guns--ugly, nasty instruments designed to kill people." He then went on to praise Kleck and Gertz for "methodologically sound research" in support of a view--that guns had significant defensive use--that he had formerly dismissed out of hand.
Kleck & Gertz (1995) also tabulates ten national level and three state level surveys on defensive gun use (DGU), all of which used slightly different methodologies, but which showed projections of 764,000 to 3,600,000 DGUs per year. Some were commissioned by pro-gun control groups, like the 1981 Peter D. Hart survey that projected 1.8 million DGUs. Which makes the Kleck & Gertz estimate of 2.4 million DGUs pretty middle-of-the-pack.
The Kleck 1994 National Self-Defense Survey asked everyone in the sample "Within the past five years, have you yourself or another member of your household used a gun, even if it was not fired, for self-protection or for the protection of property at home, work, or elsewhere? Please do not include military service, police work, or work as a security guard."
The question can be raised whether all threatening situations resulting in "defensive gun use" (DGU) in the surveys would be classed as a "crime" by the FBI UCR.
By the way, the NSPOF survey projected 1.5 million people using guns defensively 4.7 million times per year.