I think most of the com. carbines are good,I had a Plainfield years ago and was one of my favorites. I don't remember it jamming except with 30 rd. mags,but that was most likey the mags. It was very accurate. I do think I'd stay away from Universal,just because they are a bit different,although I have fired a few and they worked fine.
I've got a National Ordnance carbine, and it works just fine. I carry it in my trunk on long trips to Kentucky, and have yet to have a single problem with it. I have known people to have the early Universals, and they worked just fine. However, the late Universals are extremely hard to get parts for, and are notorious for jamming and for splitting the trigger housing at the mag well.
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