Also known as: 40mm榴弾
Generic class-name for any Grenade Launcher Ammunition, becuase most of the Weapons have 40mm calibre. Identifiable by the stubby size and rounded tip.
Notable examples are the 40×46 mm LV (low velocity) cartridge used by NATO and US forces, and the Soviet/Russian 40mm VOG-25 for GP-25 series.