Sounds just as real as the History channel show about moonshiners.
Well, I can't speak for that silly crap, but I do know that some high skill level 1911's have come out of the Philippines and out of Pakistan and Afghanistan.
It doesn't take much to make a 1911...simple construction, easily milled, even on "Harbor Freight" crap mills from China.
The hardest part is the barrel and the recoil spring.
I once saw a barrel being constructed out of a forged billet of steel...they drilled a pilot hole and slammed a rifling tool through it, then turned it down on a lathe.
I'm sure it was not quite a match-level weapon, but it will still fling a bullet and kill a man.
In Viet Nam, they would make a barrel by hammering a piece of steel around a solid piece of steel.
I still do not know how they got the rifling in there, but the pistol would damned well kill you.
The AK-47 is the most copied weapon in the world, with a huge majority of them being made in the back rooms of shacks in the rabbit warren back streets of Kabul, Baghdad, Mosul, you name it.
It is not difficult to do and no amount of griping and groaning and pissing and moaning from the ATF or the damned UN or anyone else is going to stop it.