What Kind Of Weapons Did They Use In The Korean War?

The following weapons were used during the Koran war:
- T-34-85 Medium tanks
- Vintage Tanks
- Vintage 2.36 inch M9 Bazookas
- M24 Chaffee tanks
- 105 mm howitzers
- M4 Shermans
- M26 Pershing
- M46 Patton
- British Centurion
- Many kinds of war aircrafts were also used like F-51 Mustang, F4U Corsair, Hawker Sea Fury, F-80, F9F Panthers, Yakovlev Yak 9, Lavochkin La-9, MiG 15, F-86 Sabre

The weapons used by soldiers in korean war were tanks, rifles, machine guns, Belgian FN rifles, M-1 and M-2 carbines, and some 66-millimetre Laws rockets.

www.korean-war.com

As the previous answers state, there were many different weapons on the battlefields of Korea. When you ask what weapons "they" used do you mean the Communist or United Nations forces?  Both sides used primarily leftover stocks from World War II  which had ended  less than five years previous to the onset of  conflict  in Korea.  The Soviet backed  North Korean forces  used Soviet  made  weapons and had an arguable advantage  over the U.N. Forces in a few areas, most notably  in the standard arms that rifle companies carried.  The U.S had almost completely halted development and production of  small arms in the post-WWII due to the then current administration's view that the nuclear age had made ground warfare a thing of the past. In addition to the link provided by Sanavid above, check these as well as google Korean War weapons:

http://www.rt66.com/~korteng/SmallArms/arms.htm

http://en.wikipedia.org/wiki/List_of_Korean_War_weapons

Good luck with your research!

Main weapon was the m-1 grand.  Most of the weapons were from WW2