Links

Forums (or for purists "Fora"):

• rimfirecentral.com 
• ar15.com 
• forums.theCMP.org

Organizations and Associations:

• nra.org (National Rifle Association, NRA)
• gunowners.org (Gunowners of America, GOA)
• tsra.com (Texas State Rifle Association, TSRA)
• jpfo.org (Jews for the Preservation of Firearms Ownership, JPFO)

Other:

• EagleFirearms.com
• TheCMP.org (The Civilian Marksmanship Program)
• AppleseedInfo.org (Appleseed)