The M79(nicknamed Thumper) was a WW-II gun used at the end of WW-II it was put into action when the americans saw the jap's with keroche grenade launchers. But americans did not kill with there Thumpers they used them to bust down walls to provide cover... and yes its true it was used all through veitnam but thats when we started to use it to kill. Oh by the way a keroche grenade launcher was only used for killing because 45% of the grenades were duds... LOL. Ya dont get idk mad at me for this im just suporting NEkram because he might also know this. Right NEkram???