And now for something completely different:
Is this a "C - or T Series" gun, with new, external extractor, or a "late Mk II or Mk III" gun, with firing pin safety?
Hermann
You can think of it as a post-1980 HP from the standpoint of parts interchangeability. The 1980 guns are very slight modifications of the "C" series, adding an updated feed ramp, and slightly different barrel bushing.