Another nice feature of the recoilless is that it can be made man-portable - well, you need a strong soldier, it’s bloody heavy - and thus provide an infantry squad with some very useful firepower.
The Swedish-made 84 mm Carl Gustav in this link: http://militarycanada.8m.com/84mmcarl.htm is an example of a weapon like that. (The picture shows the old M2 version). Unfortunately, unlike the 106 mm fired by Gunslinger Sr., this weapon has a low muzzle velocity, making it hard to aim. It won’t penetrate a modern tank’s frontal armour, but it’ll kill most APCs, bust bunkers and do the side or track of a tank quite nicely. It can fire some extremely unpleasant antipersonnel rounds, smoke and parachute flares.
So what you get is a shell (artillerymen sometimes coquettishly claim that their guns aren’t weapons, but their shells are) with almost the same properties as an artillery shell of the same calibre. It’s delivered from a much lighter weapon, but unfortunately with considerably lower range and with a backblast that gives the position away, prevents the weapon being used in enclosed spaces and, of course, is dangerous for people standing behind the weapon.
Infantrymen are always happy when they can carry some “organic” firepower and not have to rely on supporting units. The Vietnam-era 106 mm was, IIRC, primarily jeep-mounted and its role was ultimately taken over by TOW and other missile systems. But for close-in heavy fire support, the Carl Gustav is just the ticket, even today.
A recoilless shouldn’t be confused with a rocket launcher like the WWII bazooka (though it can look like one), because it fires shells without any propulsion of their own through a rifled barrel. Well, to add to the confusion, some shells do have rocket motors to provide extra range. Generally speaking, they kick in a couple of hundred yards from the muzzle, which makes correcting for wind a complete & utter nightmare.
This, I guess, was considerably more info than anyone ever wanted. Ah well.
S. Norman - who might still be able to fire one without hurting himself, but certainly won’t hit a target more than 100 yards away.