I checked on some more...
“Captain Mark Kelly, USN (Ret.) Americans for Responsible Solutions Tucson, AZ”
“Gayle Trotter Attorney and Senior Fellow Independent Womens Forum Washington, DC”
Kelly is allied with LaPierre/NRA, and so it appears Gayle Trotter who is also pro 2nd Amendment.
And the last guy.
“Professor David Kopel Adjunct Professor of Advanced Constitutional Law Denver University, Strum College of Law Denver, CO”
Kopel is a Dem, but a self described libertarian who is pro 2nd Amendment:
“Kopel opposes gun control and is a benefactor member of the National Rifle Association. His articles on gun control and gun violence have been cited in the Opposing Viewpoints Series. In 2003, Kopel wrote in National Review “Simply put, if not for gun control, Hitler would not have been able to murder 21 million people.” He recently contributed an article to the 59th Volume of the Syracuse Law Review entitled “The Natural Right of Self-Defense: Heller’s Lesson for the World.” He is a critic of Michael Moore and provided a list of what he characterized as Moore’s “deceits”. He appeared in FahrenHYPE 9/11, a film that disputes the allegations in Fahrenheit”