The Devastating Mk 19 Grenade Launcher In Action! – credits to War Clashes
The members of the army can be seen conducting a live fire training session where various weapons are being fired and the list of weapons includes the MK 19 Grenade Launcher.
Quite evidently the soldiers are able to cover huge amounts of the ground by firing these grenades which can be extremely useful in a real combat situation.
The grenade launcher seems to be extremely accurate and covers an area which can become the deciding factor for effective attacking.