As one of the best marksmen in my company, I was assigned this grenade launcher while serving with the Air Cavalry Division in Vietnam. It was not considered a great thing to have, as it made you something of a target for the enemy.
Two Marines wearing the green dominant ERDL uniform and flak vests display their weapons. One holds an with the buttstock removed while the other Marine holds up an grenade launcher. Several and caliber ammunition cans are visible on the ground near them.