The ones I handled weren't bad little guns as I recall, but blowback guns like that were notoriously fickle about ammo and unforgiving of a weak grip, making them prone to jam. For someone who knows how to judiciously use a little crocus cloth and a set of needle files, a little slicking up goes a long way toward reliably getting through a magazine of rounds with these kinds of little .380's.

Most folks who don't know how to do that get frustrated with what they call a "jam-a-matic" and trade them off or sell them. Spotty quality control on magazines for these kinds of guns were a big part of the problem when I was messing around with such several years ago.

Unless the mags were the problem or someone had tweaked and ruined a spring, I've rarely seen one that could not be made to be fairly reliable if you made the effort.