The M79 pistol-style grenade launcher is a single-shot, break open grenade launcher which fires a 40 x 46 mm grenade and first appeared during the Vietnam War. The airsoft version utilizes a 40mm airsoft grenade shell.
Because of its distinctive firing sound, among American soldiers, it earned the nicknames of "Thump-Gun", "Thumper", or "Blooper", "dooper" but Australian units referred to it as the "Wombat Gun".
The M79 resembles a large bore, break-action, sawed-off shotgun.
** Includes (1) one free grenade shell **
Sawed off version does not come with front sight