SHOW AND TELL 143: K98K/M98 pattern Mauser Grenade Launcher, Post World War 2. MECAR, Belgium.

SHOW AND TELL [143]: M98/K98K pattern Mauser Grenade Launcher, Post World War 2. MECAR, Belgium.

Wikipedia article on MECAR : https://en.wikipedia.org/wiki/Mecar

Wikipedia chapter on Rifle grenade :
https://en.wikipedia.org/wiki/Rifle_grenade

Wikipedia article on 22 mm rifle grenade : https://en.wikipedia.org/wiki/22_mm_grenade

Wikipedia chapter on Spigot type Rifle grenade : https://en.wikipedia.org/wiki/Rifle_grenade#Spigot-type