Real ones, full auto that is, are still available from several dealers new in the box or lightly test fired. Those are mostly SWD copies, they made literally truckloads of them.
I've been seeing them in the $4000 range which is pretty steep for the sheetmetal that they are but a bargain indeed in the full auto world.
As for the variants man.... there were tons of them.
The originals were made by a company called Ingram, who sold the design to Military Armament Corporation (MAC).
The "real" ones were the M10, in .45 ACP and the M11, in 9mm. They had folding wire stocks.
Somewhere along the way a company called Cobray got into it too, but I can't remember the timeline any more.
Can't remember if Cobray made the full autos or just a semi.
There were also a couple of other companies making clones, SWD and RPB are a couple I can recall. I've seen them in .380 from SWD if I remember.
Most of those, even the semi models, were open bolt fired before ATF poo pooed that so they still command a fairly high price for what they are.
I don't know of anyone that ever made a closed bolt model but there are probably some.
Firing them is really a joke. The cyclic rate is just ridiculously high, but it's fun for a while and a good way to enter the NFA game.
These and Uzis are probably the most reasonably priced autos out there.
