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Can a 16" carbine barrel be cut down and threaded for an NFA project?

Discussion in 'NFA & Class III Discussion' started by UnSafe, Jul 23, 2014.

  1. UnSafe

    UnSafe Sharpshooter

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    And if so, how short before the gas system no longer works?
    16" complete uppers are cheap and plentiful. Harder to find dedicated 10.5" or 12" barreled uppers as cheap. As well, don't know if the cut/thread/crown cost would cancel out any savings.
     
  2. Hump66

    Hump66 Sharpshooter

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    About 10.3" would be as short as you can go with a carbine gas system.
     
  3. Phezzik

    Phezzik Marksman

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    You can go shorter if you wish, but you would have re-position the gas port. Doable, but tricky as you have to make sure it's timed just right. Whatever you do, you need no less than 2" between the muzzle and the gas port for proper operation.
     

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