Here are some links that you may use frequently if you browse /k/:
http://boards.4chan.org/k/ A magical place.
http://archive.heinessen.com/k/ is the archiver that serves our board. If something 404s, mods get to it, or it gets deleted, it will be here. ARCHIVE IS KILL
https://www.zeemaps.com/map?group=772301 The official /k/ map. Use this to find local gunstores, shooting ranges, innawoods locations, or even fellow /k/ommandos in your area! 3,977 markers as of 12/09/14
https://8ch.net/k/ Another magical place.
http://www.imfdb.org/wiki/Main_Page What's the gun in that film/videogame? Look here.
http://www.pssurvival.com/ Is it TEOTWAWKI? Need to rebuild civilization? Here's your info.
http://world.guns.ru is one of the best informational gun sites on the web.
https://www.google.com/ Anything else that can't be answered, you know what to do.
http://kickass.to/field-manuals-t7746076.html A torrent containing 5GB of declassified Military technical and Field Manuals. KickAssTorents is kill
http://kickass.to/firearm-manuals-t7744274.html A torrent containing over 5GB of instructional manuals for various brands of Firearms. KickAssTorents is kill
̶m̶u̶r̶d̶e̶r̶c̶u̶b̶e̶.̶c̶o̶m̶ ̶A̶ ̶g̶o̶o̶d̶ ̶w̶e̶b̶s̶i̶t̶e̶ ̶t̶h̶a̶t̶ ̶h̶a̶s̶ ̶t̶h̶e̶ ̶d̶o̶/̶k̶/̶u̶m̶e̶n̶t̶ ̶a̶n̶d̶ ̶o̶t̶h̶e̶r̶ ̶i̶n̶f̶o̶r̶m̶a̶t̶i̶o̶n̶ ̶/̶k̶/̶ ̶u̶s̶e̶r̶s̶ ̶m̶i̶g̶h̶t̶ ̶b̶e̶ ̶i̶n̶t̶e̶r̶e̶s̶t̶e̶d̶ ̶i̶n̶ MURDERCUBE IS KILL
kommandostore.com Looking for milsurp? Check here.
https://gun.deals/ great search engine for multiple online gun stores- compare price find guns etc.