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Thread: new barrel install

  1. #1
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    new barrel install

    i am getting my new bushmaster HBAR 20" barrel tomorrow. i sold my 14.5" barrel. is the anything special i new to get done to it when i stall it. i know how to install a barrel but being that i am switching to a different one, do i need to get anything inspected? my buddy said to get a gunsmith to check the head spacing and something else. don't remember. i thought they were universal and all fit the same and would work with the BCG.

  2. #2
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    both barrels are bushmaster. i don't know if that matters.

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    Will the feedramps machined into the barrel extension match the upper?
    Are you using the same bolt? Did you buy a new bolt?

    You will be changing gas systems. Coming from a carbine length gas system to a rifle length. You will need the appropriate gastube and you may have to play around with buffer weights. (Assuming you were running the 14.5" upper on a carbine lower.)

    Also, headspace shouldn't be too much of an issue, if the parts are of known quality.
    Last edited by polymorpheous; 01-22-12 at 17:48.
    Quote Originally Posted by scottryan View Post
    Anybody that owns or sells pistol versions of assault rifles is a bottom feeder, irregardless of the ban status of certain ammunition.

    They are illigetimate weapons that have no real purpose other than to attract retards to the gun community.

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    the barrel is coming with the gas tube. will be using the bushmaster bolt that was used with the 14.5" barrel. do you have any recommendations on the buffer. i don't even remember which one i have.

  5. #5
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    Quote Originally Posted by jeto View Post
    the barrel is coming with the gas tube. will be using the bushmaster bolt that was used with the 14.5" barrel. do you have any recommendations on the buffer. i don't even remember which one i have.
    How many rounds through the existing bolt?
    Regardless, I would recommend a new bolt.

    As for your buffer.... Run with what you got.
    If it cycles too fast, go heavier. And vice-versa.
    Buffers are cheap.
    Quote Originally Posted by scottryan View Post
    Anybody that owns or sells pistol versions of assault rifles is a bottom feeder, irregardless of the ban status of certain ammunition.

    They are illigetimate weapons that have no real purpose other than to attract retards to the gun community.

  6. #6
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    maybe around 250 rounds fired at the most.

  7. #7
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    You are more then likely OK.
    That bolt is pretty much new.
    Quote Originally Posted by scottryan View Post
    Anybody that owns or sells pistol versions of assault rifles is a bottom feeder, irregardless of the ban status of certain ammunition.

    They are illigetimate weapons that have no real purpose other than to attract retards to the gun community.

  8. #8
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    I always throw the guages in just to check any time I change a barrel, but I have only had two that didn't check out an Oly which had to be sent back for excessive head space and a kit with mil surp parts from Hess the shop i worked in part time bought a bunch thinking they could make some quik money we ended up sending back all the kits. Most GS have the go, no go guages and won't charge much just to check and it gives you a piece of mind. Just my .02.

  9. #9
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    Quote Originally Posted by juliomorris View Post
    I always throw the guages in just to check any time I change a barrel, but I have only had two that didn't check out an Oly which had to be sent back for excessive head space and a kit with mil surp parts from Hess the shop i worked in part time bought a bunch thinking they could make some quik money we ended up sending back all the kits. Most GS have the go, no go guages and won't charge much just to check and it gives you a piece of mind. Just my .02.
    While I won't deter the gentleman from checking headspace, Bushmaster is far beyond the quality of Hesse/Vulcan/Blackthorne and Olympic Arms.
    Last edited by polymorpheous; 01-22-12 at 18:37.
    Quote Originally Posted by scottryan View Post
    Anybody that owns or sells pistol versions of assault rifles is a bottom feeder, irregardless of the ban status of certain ammunition.

    They are illigetimate weapons that have no real purpose other than to attract retards to the gun community.

  10. #10
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    my buddy has the gauges. exactly what do you measure.

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