http://www.nfatca.org
A non-profit organization that represent the NFA trade and collector
community. Their first priority was the creation of an NFA handbook which has
been accomplished. Now they are turning their attention to other projects.

http://www.mgshooters.com/
Organizers of the twice a year Big Sandy machinegun shoot in Wickieup, AZ.

http://www.rmfcsa.org/
The Fifty Caliber Shooters Assn., Inc. (FCSA) was established in 1985 by a
small group of dedicated people who set for themselves the mission to advance
the sporting uses of the .50 BMG cartridge. The FCSA is a non-profit
organization registered in Tennessee and Utah . The Rocky Mountain FCSA is the
organizer of the Cheyenne Wells, CO and Ft. Morgan, CO gun shoot

http://www.smallarmsreview.com/
monthly publication that provides a forum for all aspects of the class 3
interests, as well as any aspect of the military small arms industry.

Idaho Automatic Weapons Collectors Association
A neighbor to the west. Also invlolved in automatic firearms and organized shoots.