A good site in russian about them :
http://www.armor.kiev.ua/army/hist/takznaki.shtml
http://www.armor.kiev.ua/army/hist/takznaki-2.shtm
The american ones :
http://www.army.mil/cmh-pg/books/korea/ebb/sym.htm
The german (WW2) ones :
http://niehorster.orbat.com/011_germany/symbols/_symbols_43.html
Some wishes :
- fixed and unfixed bayonett
- possibility to hit with stockbutt
- Pistol-whipping
- handcuffs (can only be removed by another player)
- tonfa (= police club)
- machete
- molotov cocktail
- riot control stuff
- etc ...