SOME TECHNICAL MILITARY HISTORY LINKS
Guns + Ammunition
http://www.ecra.info/start.php Home Page of the European Cartridge Research Association
http://www.cartridgecollectors.org/ Home page of the International Ammunition Association
http://www.rkba.org/guns/principles/ principles of operation of firearms
http://people.howstuffworks.com/machine-gun.htm descriptions of how machine guns work
http://www.jbmballistics.com/ballistics/calculators/calculators.shtml JBM small-arms ballistics calculator
http://cartridgecollectors.org/headstampcodes.htm IAA headstamp codes for small-calibre cartridges
http://web.ukonline.co.uk/stephen.johnson/arms/ Treatise on British ammunition and ordnance 1880-1960
http://world.guns.ru/ Max Popenker's excellent site on modern firearms and ammunition.
http://russianammo.org/ Russian ammunition 12.7-57mm: very detailed
http://www.municion.org/ Spanish site providing details of small-arms ammunition: comprehensive
http://www.amkat.se/ Swedish military small-arms ammunition
http://freespace.virgin.net/ordnance.society/index.htm the website of the Ordnance Society
http://members.tripod.com/~nigelef/index.htm British artillery in WW2
http://www.military-info.com/MPHOTO/P110.htm copies of US military ammunition manuals for sale
http://www.globalsecurity.org/military/systems/munitions/ammo.htm explanations and lists of current military ammunition
http://www.cartridge-corner.com Curtis Steinhauer's site for ammunition collectors
http://www.thegunzone.com/ The Gun Zone - many articles
http://www.jaegerplatoon.net/MAIN.html Finnish Army historical guns (all calibres)
http://dragonsoffire.com/home.htm Japanese automatic weapons
http://www.dtic.mil/ndia/ Index of downloadable presentations from the US National Defense Industries Association conferences
http://ammoguide.com/ cartridge identification guide (not free)
General Military
http://www.defense-aerospace.com/ news and information about current defence issues
http://www.defenseindustrydaily.com/ Defense Industry Daily
http://www.sinodefence.com/default.asp Chinese Defence Today - with details of equipment
Aircraft + Armament
http://users.telenet.be/Emmanuel.Gustin/fgun/fgun-in.html Emmanuel Gustin's fighter gun website
http://www.skomer.u-net.com/projects/start.htm Chris Gibson's site on United Kingdom postwar aerospace projects (including guns!)
AFVs + Armament
http://www.battlefield.ru/ WW2 Soviet and Allied tank guns AP performance
Warships + Armament
http://www.navweaps.com/ The outstanding naval weapons site, containing detailed information
DISCUSSION GROUP SITES
http://forums.delphiforums.com/autogun/messages/ the author's forum for discussion of all topic relating to military guns and ammunition
http://cartridgecollectors.org/forum/index.php IAA cartridge collectors' forum (focuses on smaller calibres)
http://www.bocn.co.uk/vbforum/ British Ordnance Collectors Network: the best UK site for collectable ammunition discussions (focuses on larger calibres)
http://www.wk2ammo.com/ the German WW2 ammo site (bilingual, but mostly in German)
http://www.thefirearmblog.com/blog/ The Firearm Blog: US blog+discussion site dealing with new developments in military and civilian firearms
http://www.thinkdefence.co.uk/ Think Defence: blog+discussion about UK defence issues
http://www.china-defense.com/smf/index.php/ China Defense forum, particularly strong on Chinese military equipment of all services
http://208.84.116.223/forums/index.php?&&CODE=00 TankNet: a group with some very good contributors on tank development, plus other aspects of military technology
http://warships1discussionboards.yuku.com/ Warships1 site, with discussion groups on warships but aircraft and land forces also