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Rudolf Frommer was a self-taught engineer and firearms designer who worked his way up through the FEG concern in Budapest to eventually hold the position of CEO. During this time he developed a series of long-recoil, rotating-bolt pistols culminating in the Frommer Stop, which was adopted by the Austro-Hungarian military. At some point during this time he also produced this prototype rifle, which is similarly a long-recoil rotating bolt design. I have no information on its production or performance, but I will give you as much of a look into its operation as I can.
Frommer 1910: https://www.youtube.com/watch?v=fTsVD1G1xwM
Frommer Stop Slow Motion: https://www.youtube.com/watch?v=39tX_7-mkMA
Rast & Gasser 1898: https://www.youtube.com/watch?v=m1eXG-kVlf8
Roth-Sauer Automatic Pistol: https://www.youtube.com/watch?v=6iTDPeBK0aY
At Forgotten Weapons I think the most interesting guns out there are the most obscure ones. I try to search out experimental and prototype weapons and show you how they work, in addition to more conventional guns that you may not have heard of before. You’re much more likely to find a video on the Cei Rigotti or Webley-Fosbery here than an AR or Glock. So, do you want to learn about something new today? Then stick around!