This Mannlicher – Schoenauer was most likely built by Franz Neuber, a renowned gunmaker in Wiener Neustadt, Lower Austria, south of Vienna. Neuber had Austrian, German and US patents for this grip safety modification, together with Joseph Tambour. Tambour had patented many safety designs for all kinds of firearms. Neuber is well known for his custom Mannlichers. He modified both straight – pull and turnbolt Mannlicher actions and combined them with Mauser staggered column, flush magazines.