ACR barrel twist question
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  1. #1
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    ACR barrel twist question

    Did Bushmaster make a factory 10.5" barrel in 1/9 twist? Thanks for any info.

  2. #2
    Forum Lurker Locutus494's Avatar
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    No. The different length barrel kits in 10.5", 14.5", and the heavy 18" have only ever been 1/7. Only the original M4 profile 16.5" barrel was 1/9 twist.

  3. #3
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    Thanks, another follow up question, does anyone have a description of how the factory 10.5 barrels are marked? Where is twist stamped, etc? Thanks again.

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  5. #4
    Forum Lurker Locutus494's Avatar
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    I've never seen a 10.5" specifically, but all the others I've had have been marked on the bottom of the barrel. I've seen Bushmaster ARs marked that way too, so it seems to be the weird choice that BM has made to do it on the bottom.

  6. #5
    I like Turtles bigdog2003_99's Avatar
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    I have a factory 10.5 at the shop but no here. I’ll check the markings but i think they are on the bottom as well. I’ll be listing the barrel immediately after I pick it up if anyone is looking.

    Also it’s a 1/7. There aren’t any 1/9 barrels being made anymore.
    Rest in Peace Franny
    Employee BBC Armament 07/02
    Email me for questions or Acr barrel conversions (remove spaces)
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