I once bought a Mexican .22 Single shot pistol for, I think $12. It vaguely looked like a Colt single action. It had a lot of plastic and stamped sheet metal.
It used a rolling block action made of sheet metal. The barrel itself was of high quality. I guess I should not have been surprised that it was very accurate. Really no reason it should not have been.
It was probably made as cheaply as possible for a gun which actually performed OK. Much better design than the Liberator which was all but useless.
Mendoza?