K-N
- Katyusha: Soviet
- Knee mortar: Japanese Type 89 50 mm light mortar, called "knee mortar" by American troops who thought it looked designed to be fired braced on the knee (which it was not).
- K 44: German 128 mm gun
- KwK 36: German 88 mm tank gun
- KwK 38(t): German designation of Skoda A7, used on the Panzer 38(t)
- KwK 43 L71: German long-barrel 88 mm tank gun
- Land Mattress: British 32 tube 76.2 mm rocket artillery
- leFH 18: German 105 mm howitzer
- leGebIG 18: German 75 mm mountain infantry gun
- leIG 18: German 75 mm infantry gun
- Little David: Aerial bomb firing siege mortar planned for combat service with the United States
- M1 8 inch Howitzer: American 203 mm howitzer
- 4.5 inch Gun M1: American 4.5 Inch Gun
- M2 60 mm Mortar: 60 mm light mortar of the US Army
- M1 75 mm Pack Howitzer: American 75 mm mountain gun
- M1 90 mm Gun: American 90 mm antiaircraft gun
- M2 90 mm Gun: American 90 mm antiaircraft gun/Anti tank gun
- M1 155 mm Howitzer: American 155 mm howitzer
- M1 240 mm Howitzer: American 240 mm howitzer
- M2 105 mm Howitzer: American 105 mm howitzer
- M2 155 mm Gun: American 155 mm gun ("Long Tom")
- M2 4.2 inch Mortar: American 107mm mortar
- M4 4.2 inch recoilless mortar: American 4.2 inch recoilless mortar
- M3 3 inch Gun: American 76.2 mm antiaircraft gun
- M3 37 mm Gun: American 37 mm antitank gun
- M1 57 mm Gun: American 57 mm antitank gun
- M3 90 mm Gun: American 90 mm antiaircraft/antitank gun
- M5 3 inch Gun: American 76.2 mm antitank gun
- M7 3 inch Gun: American 76.2 mm antitank gun used in the M10 Wolverine
- M8 4.5 inch Rocket: American artillery rocket
- M1 75 mm Pack Howitzer: American 75 mm mountain gun
- M18 recoilless rifle: Late-war American 57 mm recoilless rifle
- M20 recoilless rifle: Late-war American 75 mm recoilless rifle
- M1919 16 inch Coast Gun: American 16 inch coastal defense gun
- M1937 Howitzer: Soviet 152 mm howitzer
- M1938 Howitzer: Soviet 122 mm howitzer
- 76 mm divisional gun M1939 (USV): Soviet 76.2 mm gun
- M1942 Gun: Soviet 76.2 mm field gun and antitank gun
- M1943 Howitzer: Soviet 152 mm howitzer
- Morser Karl: 600mm German siege howitzer
- Mortaio da 81/14 Modello 35: standard Italian medium infantry mortar
- Mk 7 16"/50 Gun: American 16" battleship gun
- ML 3 Inch Mortar: British 76.2 mm mortar
- Mortar Type 89: Japanese 50 mm light mortar, known by Americans as the Knee mortar
- Nebelwerfer 41: German six tube 150 mm rocket launcher
Read more about this topic: List Of World War II Artillery