Just received my second CETME-C flat from RTG, and am very happy with both of them. First flat is now a functioning rifle, everything in spec with CETME-C parts. Had a small issue with the rear butt stock holes and barrel retaining pin hole, (nothing major, holes didn't quite line up) but fitting and fine tuning are all part of building rifles. Would highly recommend if you have a CETME-C parts kit, as these are the best flats available.