Yes. They copied the Sterling Mk5 bolt design. The location of the charging handle hole is slightly different and IIRC it’s metric.
They copied the charging handle from H&K and the extractor is stamped sheet metal. I don’t know where they copied it from. Butt looks like it was copied from H&K too.
The barrel nut does make barrel changes easy, but it gets hot fast (like the Uzi) and there’s not really a good place for your support hand.
They made some forty-five round magazines for it that are hard to find and quite expensive.