Shotgun Information:
Shotgun-Insight - Shotgun pattern analysis and free online tools.
Shotguns - A shotgun guide focused on correct information, chokes, choke tubes, patterns and more.
Shotgun World - A central resource for all things shotgun related including forums, classifieds and gun identification.
Gun Appraisals - Get an expert's opinion on the value of your shotgun, fast, fun and accurate. Let our experts guide you on your next shotgun purchase or sale with an accurate appraisal first.

Shotgun Manufacturers:
AYA
A. H. Fox
Arrieta
Atkin Grant & Lang
Baikal
Benelli
Beretta
Bill Hanus Birdguns
Browning
Charles Daly
Churchill
Cole Arms
CrossFire
CVA
CZ
Dakota Arms
Diamond
EAA
Evans
Fabarm
F.A.I.R.
Falco
Fausti Stefano
Ferlib
Franchi
Galazan
Greener
Griffin&Howe
H&K/Fabarm
H&R 1871
Herstal
Holland&Holland
Huglu Shotguns
Investarm
Ithaca
KhanShotguns
Kimber
Kolar
Krieghoff
Laurona
Ljutic
Lu-Mar
Marlin
Marocchi
Merkel
Mossberg
Miroku
Orvis
Perazzi
Purdey
Remington
Rossi
Ruger
Sabatti
Savage
Scattergun Tech
Shooters Arms
Sig Arms/Rizzini
Silma
SKB Shotguns
Stoeger
Thompson Center
Traditions/Fausti
Tristar
Verney-Carron
Verona
Weatherby
Winchester
Ziegenhahn
Zoli Antonio