Political Information (.com) -- A search engine for politics & policy

Gun Owners of America
National Rifle Association
Violence Policy Center
American Shooting Sports Council
Handgun Control
Coalition to Stop Gun Violence
Sportsmen's Association for Firearms Education, Inc. SAFE is a non-profit grassroots organization dedicated to educating the public, media, and government about Second Amendment rights
RKBA.net A comprehensive collection of firearms resources on the web, including gun manufacturers, gun-related newsletters and political interest groups
Virginia Citizens Defense League
Join Together Online - Gun Violence A news and resource center for citizens working to reduce gun violence, from the Boston University School of Public Health.