- American Single Shot Rifle Association
- Broomfield Veterans Memorial Museum
- Buffalo Bill Historical Center
- ATF - Bureau of Alcohol, Tobacco and Firearms
- Civilian Marksmanship Program
- Colt Collectors Association
- Colorado State Shooting Association
- Colorado Rifle Club
- The Dallas Arms Collectors Association
- Firearms Coalition of Colorado
- Firearms Owners Against Crime
- German Gun Collectors Association
- Gun Owners Foundation
- John Monroe Davis Gun Museum
- Kiowa Creek Sporting Club
- Independence Institute
- Ohio Gun Collectors Association
- L.C. Smith Collectors Association
- Marlin Firearms Collectors Association
- Model 1911A1
- National Firearms Association (Canada)
- The National Muzzle Loading Rifle Association
- NRA - National Rifle Association
- NRA Foundation
- NRA of Great Britain
- New Mexico Gun Collectors Association
- Pikes Peak Firearms Coalition
- Remington Society
- Replica Percussion Revolver Collector's Association
- Rocky Mountain Gun Owners
- SAAMI Sporting Arms and Ammunition Manufacturers Institute
- Second Amendment Foundation
- Sharps Collector Association
- Trapdoor Collector HomePage
- Washington Arms Collectors
- Weatherby Collectors Association
- Ye Connecticut Gun Guild
- Antique Arms at West Townsend
- Antique Guns
- Arms & Armour Auctions
- Auction Arms Inc.
- Century International Arms
- Cherry's Fine Guns
- Civil War Antiques (Will Gorges)
- Collectors Firearms
- Dads Wholesale (Don Douglas)
- David Carroll Smith & Wesson Collector Firearms
- Frontier Gallery
- Martin B. Retting, Inc.
- Norm Flayderman
- Sarco
- Springfield Armory
- Trapdoors Galore
- W. Larkin More & Co (Fine Doubles)
- The Union Drummer Boy (Civil War Items)
- Armalite
- Auto-Ordnance Corp.
- Beretta
- Ballard Rifle & Cartridge Co.
- Benelli USA
- Briley
- Browning
- Cimarron Arms
- Colt Defense & Military
- Colt Consumer
- CZ
- Daisy
- Dakota
- Dixie Gun Works
- Federal Cartridge Co.
- Fiocchi of America, Inc.
- Goex Black Powder
- H & K
- Harrington & Richardson
- Hi Standard
- Hodgdons Powder Co.
- Interarms
- Ithaca Gun Co.
- Kimber
- Krieghoff
- Lightning Rifles
- Magnum Research
- Marble Arms
- Marlin Guns
- Navy Arms
- North American Arms
- O.F. Mossberg & Sons
- Remington
- Sigarms
- Sturm Ruger & Co.
- Savage Arms
- Springfield Armory
- S & W
- Taurus Int. Firearms
- Uberti USA, Inc.
- Weatherby, Inc.
- Winchester
Ramah, Colorado 80832
Aurora, CO 80014
Colorado Springs, CO
Aurora, CO 80012
Wheat Ridge, CO 80212
2980 S Galapago St
Englewood CO 80110-1448
Phone: (303) 781-3382