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Thread: Gas Port Erosion @ 10K

  1. #11
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    The more the gas port opens up, the quicker it progresses. Since a Bushmaster's gas port is not to spec and already 'more open' than it should be, this will progress significantly faster resulting in more wear n' tear and inevitable problems.

  2. #12
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    How important of a role does the proper material play?
    I.e. 4150CMV and hard chrome lining.

    Obviously rate of fire can't be accurately quantified.
    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.

  3. #13
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    Quote Originally Posted by rojocorsa View Post
    Wait, so is that normal for a properly made AR-15 too?
    Yes. Will it erode at a slower rate if harder barrel steel and a smaller GP is used? Ya probably. How much so? Don't know for sure.



    C4
    Last edited by C4IGrant; 11-23-12 at 15:18.

  4. #14
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    Wow I had no idea, pretty interesting. Thanks for posting this.

  5. #15
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    I've sectioned barrels with 25 and 30K rounds through them that didn't look quite that bad. And I've sectioned barels with fewer than 50, one with exaclty 30, and one with 5 rounds through it.

    The bad news-- it starts right away. The good news, maybe: the erosion occurs along the axis of the bore and does not creep up the gasport very much, proportionally speaking. In my opinion, gas port erosion does not equal gas port enlargement.

  6. #16
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    Quote Originally Posted by Ned Christiansen View Post
    The bad news-- it starts right away. The good news, maybe: the erosion occurs along the axis of the bore and does not creep up the gasport very much, proportionally speaking. In my opinion, gas port erosion does not equal gas port enlargement.
    That's interesting.
    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.

  7. #17
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    that barrels been very hot, it is hard to even find the rifling.
    Last edited by Colt guy; 11-24-12 at 15:19.

  8. #18
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    Quote Originally Posted by hotrodder636 View Post
    Use the orange search button for info on the Bushmaster BCWA3F.
    Sometimes it nice to have this sort of info all in the same thread.

  9. #19
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    Quote Originally Posted by Ned Christiansen View Post
    I've sectioned barrels with 25 and 30K rounds through them that didn't look quite that bad. And I've sectioned barels with fewer than 50, one with exaclty 30, and one with 5 rounds through it.

    The bad news-- it starts right away. The good news, maybe: the erosion occurs along the axis of the bore and does not creep up the gasport very much, proportionally speaking. In my opinion, gas port erosion does not equal gas port enlargement.
    Hey Ned, I don't know about the GP size not opening up. I have seen some 10.5's with much larger GP's (due to erosion).

    Maybe it is a case by case type thing based off of barrel length, steel,etc?

    C4
    Last edited by C4IGrant; 11-23-12 at 22:17.

  10. #20
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    On a particular contract I worked on we borescoped the barrels due to issues we had with the BM barrels. The armory supervisor stated that if the port was "egged" out we would replace them because they knew from experience that the issues weren't far behind- specifically bolt bounce.



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