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Variable-length firearm

  • US 10,641,567 B2
  • Filed: 03/15/2017
  • Issued: 05/05/2020
  • Est. Priority Date: 03/15/2016
  • Status: Active Grant
First Claim
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1. A firearm comprising:

  • a frame having a cartridge feed;

    an assembly consisting of an upper long barrel and a lower short barrel, the short barrel being shorter than the long barrel;

    control tracks on the frame; and

    respective guide tabs guided in the control tracks for movement of the barrels along the control tracks between upper and lower end positions in each of which a respective one of the barrels is aligned with the cartridge feed, sets one of the barrels as an active barrel, and can be locked in position.

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