Hi Pat,
We were still issued these as Platoon weapons in the 70's. By then they were mainly being used for para flares. Very simple weapon, and I imagine with just a little practice a good gunner could drop a bomb where every he wanted to back then.
I used some with my RM, just need to make a sling. The carrying cases give the troops something else to hold other than a rifle or a spade.
Cheers
Al