From what I've read, I think they are Yugoslavian, but a few places have listed them as Romanian. Sportman's doesn't mention chrome (No chrome would indicate Yugo) Additionally, Romanians don't use the threads/Muzzle device. so I'm going with Yugo. Most likely those threads are 1x14rh which will determine origin for sure.
In other posts people have stated that they are neither ported for gas nor cut for the extractor. The threads should fit the receiver (not sure as to the depth of chamber in regards to the shoulder...)
Also, the rest of the component slots haven't been cut (RSB, FSF, FSB, GB).