Unlike the Maxim thread, these aren't in current service or anything so far as I am aware, so hopefully I can make it on topic enough, else just move it out of here.
But... the Historical Firearms people are making a book on the PIAT, and... while I don't really follow if it's just an eBook you get a free copy of or what, but you can register for it now:
I always found these interesting weapons to discuss tactically, because of their unique nature. No backblast, so can be used indoors and otherwise in tight situations. Minimal firing signature so some of the need for short flash-to-bang or shoot-and-scoot can be negated. But very, very short range (like 100m). Overall, pretty effective. Biggest downsides are attempts to over-use it, so disappointment it's not also a bunker-busting arm (it is very, very HEAT only).
I've long been a proponent of not always using weapon systems at max effective, but getting as close as you can otherwise, to increase hit probability, take advantage of the situation (close with the objective) faster, etc. So, zillions of tales of a major peer conflict with a hilariously short-range AT weapon are good fodder to discuss this.
Work for the book: