Shotguns and Smoothbores

Brignoli Armi
Dealing in firearms and repairs since 1965. Hunting and sporting guns available. Based in Italy.
http://www.brignoliarmi.com

Drilling Hotline
specializes in combination guns, drillings, and double rifles by Krieghoff, J.P. Sauer, Merkel, and Colt Sauer.
http://www.drillinghotline.com

Four-Ten (.410) Shotgun Resources
Resource site for fourten (.410) shotgun shooters and reloaders.
http://www.4-10.freeuk.com/

G-Man Weaponry
Manufacture of Class 3 AOW short barrel shotguns, and suppressors. Also a Class 3 dealer and Class 2 manufacturer.
http://www.g-man-weaponry.com

Parker Gun - Classic Catalogues
Parker Bros. Gun classic catalogues in electronic-book form.
http://oldmp.com/parkercatalogues

Purland Guns
Specializes in vintage American and English shotguns and rifles. Includes an inventory and information about their hunting trips. Based in Leicestershire, England
http://www.purlands.com/

Shotgunworld.com
A central resource for all things shotgun related. Forums, classifieds, gun ID and gun values. Also, help you find the lowest price.
http://www.shotgunworld.com