1961, PAVN/NVA forces doing a thing to take a village

Yep, gonna be using an RMN-50. Or the 55mm Kalisnokov motar cup.

It was pretty much the soviet way of making [url=https://en.wikipedia.org/wiki/RM-38]this[/url] into [url=https://en.wikipedia.org/wiki/Type_89_grenade_discharger]this[/url] while using standard soviet munitions (7.62x54R cartridges and 50mm mortar shells... or hand grenades)

Meanwhiles, [url=https://en.wikipedia.org/wiki/M79_grenade_launcher]America was working on doing its own thing[/url], but for now relied on bazookas, 57mm recoilless rifles, and rifle-grenades.