1. The Johnston was made to be a lightweight, high-capacity, high volume lead slinger, and the “radiator” is just a really huge heat sink to keep the tiny barrel from burning anything/anyone. Another novel idea was incorporating the muzzle device as part of the barrel shroud, making the rifle bark loudly at the enemy, but keeping noise down aft of the muzzle.

  2. There is a picture of Melvin Johnson and Isaac Newton Lewis, shooting a Lewis machine gun together in the book Johnson Rifles and Machine Guns by Bruce N. Canfield. Is it possible that this is an attempt to simplify the original Lewis machine gun.

  3. For those of you looking for information on this gun,Im the only surving person that knows about this one of a kind machine gun! The rest of the I see people say know nothing about this gun but me.I have photos and documentation to back up my statement and only me! Bruce Johnston in Whitesboro New York

  4. Dear Bruce;
    I would like to know more about this weapon. Details such as weight length, width, magazine capacity and weight, BBL Length, etc…
    815-404-3299 afternoons.

  5. So when was it made? The photos are dated 1937.

    There’s something strange here, but was it a 1918 weapon (and so presumably designed by the earlier Johnston) being re-photographed twenty years on, or was it a 1930s weapon (and so “rotary magazine” Johnson) with yet another confusing number allocated to it.

  6. Fwiw, the receiver of the bare barrel version shows “Model D. 1918”, and Pat’s Pend.

    The lead image in the Wikipedia article shows a shrouded gun (same one?) with the same receiver markings. A label plate in the image shows an ordinance number, and a 1937 date.

    • It was never patented because the govt. felt it was to large for service men because of the large capacity clips that this gun would need in the field! This gun could fire between 450-1500 rounds a minute. Front trigger semi- rear trigger full auto. That’s the kind of fire power I want in BATTLE!

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