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Thread: 16" pencil barrel

  1. #11
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    Thanks Molon.
    Random observation, I was a bit surprised to see how short the gas system is on some of those barrels, given their length.

  2. #12
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    Quote Originally Posted by Benito View Post
    What is the diameter difference between a pencil and lightweight barrel?
    I always thought they were synonyms of each other.
    What are the criteria for being considered a pencil vs lightweight profile?
    A true "lightweight" or "pencil" barrel tapers from .67" to .60" behind the gas block, is .625" at the gas block, and is .57" in front of the gas block with a small flare before the gas block and before the muzzle threads. Anything smaller than a .75" or "Govt" barrel could be called lightweight though.

  3. #13
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    http://www.brownells.com/rifle-parts...prod71164.aspx

    16" lightweight Colt barrel assembly in-stock in case you go through with your plan (which I think is a good one). Will need the crush washer and FH as they're not included.
    Last edited by Scotter260; 06-15-15 at 16:52.
    "...forgive us our trespasses as we forgive those who trespass against us..."

    "I had no real need to remove it, but I like to check out things to see why they're so wonderful." - markm

  4. #14
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    Quote Originally Posted by Scotter260 View Post
    http://www.brownells.com/rifle-parts...prod71164.aspx

    16" lightweight Colt barrel assembly in-stock in case you go through with your plan (which I think is a good one). Will need the crush washer and FH as they're not included.
    Thanks, but thinking of going middy too. My last few have been Melonite as well.
    Last edited by cutter_spc; 06-16-15 at 00:35. Reason: spelling

  5. #15
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    I am a fan of A1ish inspired profiles on carbines for some. The OP's rifle could very well be one of those. For 16" barrels, I would definitely look at a longer than carbine gas system, something in the range of mid to KAC length.

  6. #16
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    Quote Originally Posted by cutter_spc View Post
    Thanks, but thinking of going middy too. My last few have been Mennonite as well.
    Ha! I don't know what religion my barrels are. Perhaps they are atheist.

  7. #17
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    Na, just a simple life.

  8. #18
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    Quote Originally Posted by pezboy View Post
    A true "lightweight" or "pencil" barrel tapers from .67" to .60" behind the gas block, is .625" at the gas block, and is .57" in front of the gas block with a small flare before the gas block and before the muzzle threads. Anything smaller than a .75" or "Govt" barrel could be called lightweight though.
    Good to know. Not to take the thread off topic, but does anyone know what barrel thicknesses would be considered pencil/lightweight/midweight for a .308/7.62 AR?

  9. #19
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    Quote Originally Posted by BillyJack556 View Post
    Ha! I don't know what religion my barrels are. Perhaps they are atheist.
    LOL, damn spell check.

  10. #20
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    Quote Originally Posted by Benito View Post
    Good to know. Not to take the thread off topic, but does anyone know what barrel thicknesses would be considered pencil/lightweight/midweight for a .308/7.62 AR?
    FWIW, the M14 barrel tapers from .74" to .63" before the gas cylinder and then is .60" in front of the gas cylinder. So really, not much thicker than an M16A1 barrel. There probably aren't many 7.62 AR barrels that are that light though. The MK17 SCAR has a pretty light profile but I don't know the dimensions.
    Last edited by pezboy; 06-16-15 at 13:19.

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