I will be collecting in-game screenshots of as many weapons as I can below.
Assault Rifles (Medium)
- http://brink.wikia.com/wiki/Gerund - http://world.guns.ru/assault/usa/m14-e.html (http://www.gun-world.net/usa/r/m14/mcsbig.jpg), various manufacturers contracted by US Govt.
- http://brink.wikia.com/wiki/Euston - http://world.guns.ru/assault/usa/m4-m4a1-e.html (http://www.vltor.com/handguards_and_rails_pics.htm#BE4), made by Colt
- http://brink.wikia.com/wiki/Rhett - http://world.guns.ru/assault/switch/sig-550--551--552-e.html, made by SIG
- http://brink.wikia.com/wiki/Rokstedi - http://world.guns.ru/assault/usa/fn-mk16-mk17-scar-e.html, made by Fabrique Nationale Herstal
- http://brink.wikia.com/wiki/FRKN-3K - http://world.guns.ru/assault/fr/famas-e.html, made by St-Etienne
Grenade Launchers
- http://brink.wikia.com/wiki/Lobster (Medium) - http://world.guns.ru/grenade/switch/bt-lg06-e.html, made by Brügger & Thomet
- http://brink.wikia.com/wiki/EZ-Nade (Heavy) - http://world.guns.ru/grenade/de/hk-gmg-e.html?, made by Heckler-Koch
Machine Guns (Heavy)
- http://brink.wikia.com/wiki/SAW-Like_LMG - http://world.guns.ru/machine/usa/m249-saw-e.html, made by Fabrique Nationale Herstal
- http://brink.wikia.com/wiki/Maximus - http://www.thefirearmblog.com/blog/2009/01/19/knights-armament-chain-saw/, made by KAC
- http://brink.wikia.com/wiki/Gottlung - http://world.guns.ru/machine/usa/m134-minigun-e.html, made by General Electric
Shotguns
- http://brink.wikia.com/wiki/Mossington (Medium) - http://world.guns.ru/shotgun/it/benelli-m4-m1014-e.html, made by Benelli
- http://brink.wikia.com/wiki/Hjammerdeim (Heavy) - http://www.tactical-life.com/online/products/srm-arms-1216-semi-auto-shotgun/, made by SRM
Long Rifles (Light)
- http://brink.wikia.com/wiki/Drognav - http://world.guns.ru/sniper/sniper-rifles/de/dsr-1-e.html, made by DSR-Precision GmbH
- http://brink.wikia.com/wiki/Barrett - http://world.guns.ru/sniper/sniper-rifles/de/mauser-sr-93-e.html, made by Mauser Werke
SMG (Light)
- http://brink.wikia.com/wiki/Kross - http://world.guns.ru/smg/usa/kriss-super-v-e.html, made by TDI
- http://brink.wikia.com/wiki/Galactic - http://world.guns.ru/smg/de/hk-ump-e.html, made by Heckler & Koch
- http://brink.wikia.com/wiki/Bulpdaun - http://www.imfdb.org/index.php/Magpul_PDR, made by Magpul
- http://brink.wikia.com/wiki/CARB-9 - http://www.olegvolk.net/gallery/d/26351-2/SU16Ewallpaper.jpg /w http://world.guns.ru/civil/usa/kel-tec-su-16-e.html Stock and 9mm straight magazine; SU-16 made by Kel-Tek
- http://brink.wikia.com/wiki/Tampa - http://world.guns.ru/smg/switch/b-t-mp-9-e.html, made by Brügger & Thomet (Steyr sold the TMP design to B+T in 2001)
Pistols (Light Secondary)
- http://brink.wikia.com/wiki/Kolt - (?) m1911 variant of some sort, original design by Browning for Colt Arms
- http://www.flickr.com/photos/25771967@N02/5463467828/ - http://world.guns.ru/handguns/hg/isr/bul-cherokee-e.html, made by Bul Ltd
- http://brink.wikia.com/wiki/Belgo - http://www.fsdip.com/website/VBRBelgiumHome/English/ThePDW792VBRBCompact/tabid/190/Default.aspx, made by Van Bruaene Rik
- http://brink.wikia.com/wiki/Sea_Eagle - http://world.guns.ru/handguns/hg/usa/ruger-sr9-e.html, made by Ruger
- http://brink.wikia.com/wiki/Ritchie - http://www.deactivated-guns.co.uk/detail/Dan_wesson.htm?, made by Dan Wesson
Pre-Order Weapons
- http://brink.wikia.com/wiki/Hockler - http://world.guns.ru/smg/de/hk-mp7-pdw-e.html, made by Heckler-Koch
- http://brink.wikia.com/wiki/Caesar - http://www.weapon.ge/index.php?sel=1&id=182&man=&coun=24&cat=&l=en, made by IZHMECH
Please help out if you can find some of the information missing above; make corrections; or provide missing/useful screenshots, images, or links.
This is a community effort, and i have not gathered all of this information by myself. There have been many helpful comments from the forum community, enough that attributing them all would take too long to list. If you have helped in any way (or even tried), you have my thanks.
Keep in mind that this is a work in progress, so I will be altering this post as I get more information/images.