On page 54 of W. Darrin Weaver's excellent "DESPERATE MEASURES; The Last Ditch Weapons of the NAZI Volkssturm" {Collector Grade Publications 2005}, there is a picture taken from a 1944 newsreel of a queue of Volkssturmmänner, one of which has a half-stocked rifle with double-set triggers and a bolt handle that appears to be identical or very close to this Nordheim.