What possible use do they offer? A skilled shooter will be able to fire the semi version fast and accurately enough for any scenario where a pistol can be used.
While Im not a real big fan of the "pistol" type guns, I can see them having a place, especially up close. With the usual high cyclic rate of the full auto pistols, I doubt a semi shooter would be able to get off three to five rounds as fast as one pull of the trigger on the auto would give, and with the right technique, at reasonable ranges, I think youre going to see good, solid hits.
The wisdom is probably that its a full auto arm that can be concealed, but do they really serve a purpose when used in full auto mode?
I think if you understand their use, and when to use it, yea, they do. The multiple, instantaneous hits of a full auto, work along the same lines as buckshot out of a shotgun does in respect to overloading the nervous system. For up close, fast shooting, I can see one working very well, if youre practiced with it.
There was an interesting shoot off between two Uzi's. One was full auto and had to shoot full auto all the time. The other was semi-auto. Ten different shooting courses were set up. The semi-auto won 9 out of ten.
This is really more of a shooter issue than a gun issue. In the case of the Uzi, anyone familiar with the gun should be able to squeeze off single shots without to much trouble.
I've run similar courses with my MP5, and had no troubles taking long shots singly, with the selector set to full.
The only time that the full auto was better was at close range with tagets close together.
This tends to be the world of the SMG. But regardless of the gun, its the shooter whos running it, not the other way around.
Considering that a full auto pistol is VERY difficult to control
Again, this depends on the shooter, and the gun. Ive seen people shoot full auto Glocks with little trouble and great effect. Ive also seen what happens with a MAC when shot with the stock collapsed. The position of the grip in relation to the weight/mass has a big impact on things.
Also, shooters who understand full auto and its technique, tend to do better than those who dont. A lot of the problem here is, many shooters have no or little experience or training with one to really know or understand. The movies certainly have it wrong for the most part, which is usually very obvious the first time you shoot one, if thats where you learned how.