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AR bolt catch problem

Discussion in 'Rifle Discussion' started by Ironbar, Dec 15, 2015.

  1. Ironbar

    Ironbar Tigard, OR Well-Known Member

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    OK gents, I seems to have had no end of frustrations with the rifle I built, and here's a new one.

    The bolt catch on my rifle will work when there's a mag in the mag well. If I drop the mag, the bolt will stay back, but it hangs on by a thread. It is the same with the stock bolt catch, and a Phase 5 ambi bolt catch.

    When there is no mag in the mag well and I rack the bolt while pressing the LOWER part of the bolt catch to engage the bolt, it will not engage at all. And before you even ask, yes I know the difference between how to press the bolt catch to engage it, and to release it.

    When I swapped out my lower for another lower this past weekend, the rifle functioned perfectly.

    HELP!
     
  2. oli700

    oli700 Rogue Valley Well-Known Member

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    that is odd as hell......usually the other way around....without having the lower in hand I have nothing for this one, sorry
     
  3. oli700

    oli700 Rogue Valley Well-Known Member

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    if it wasn't then the follower wouldn't activate it ....but it does and he cant manually set it.....weird
     
  4. Ironbar

    Ironbar Tigard, OR Well-Known Member

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    UPDATE!

    OK folks, I'm one happy camper today. Between me and a friend, we figured out that the bolt catch wasn't catching because of the lower itself.

    It turns out that the channel that the bolt catch rides in wasn't milled out enough. This is an Anderson Manufacturing lower (stripped), and no, it wasn't advertised as a second or blemished, etc. As a result, when the bolt catch was depressed to capture the bolt, the lever simply couldn't be depressed far enough for it to work!

    We solved the problem by filing down the back side of the bolt catch that goes against the detent. Now the catch can raise up high enough when you press the lever and it captures the bolt just fine. Additionally, it doesn't release the bolt when you bump or jiggle the rifle.

    Suffice to say that even though the problem is solved, I will never again purchase another Anderson lower, EVER!

    Thanks a million to xsubsailor (he doesn't post much here at all anymore) for all his help today!
     
  5. Ironbar

    Ironbar Tigard, OR Well-Known Member

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    I wish I had know prior to buying. Live and learn for sure!
     
  6. madcratebuilder

    madcratebuilder Ardenwald, OR Well-Known Member

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    Sure it wasn't a out of spec bolt catch? I've assembled several Anderson lowers with out a single problem. Out of spec parts in a LPK is more common that a out of spec lower.
     
  7. oli700

    oli700 Rogue Valley Well-Known Member

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    nice

    I have sent two stripped uppers back to Anderson that were the worst machining I have ever seen on a part ......they acted offended , my rear sight wouldn't even mount because the cutter they used for the rail should have been changed 1000 parts ago
    I will never entertain Anderson again, horrible but you reach in the crapper enough and your bound to end up with a turd
    IMG_0402_zpsbef47e38.jpg
    IMG_0417_zps2f337ddb.jpg
     
  8. Ironbar

    Ironbar Tigard, OR Well-Known Member

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    I am absolutely positive that it was not the bolt catch. You could see clearly when compared to three other lowers that it was not milled out far enough.
     
    dwaineshort likes this.
  9. MilitantBEEMER

    MilitantBEEMER Eugene Silver Supporter Silver Supporter

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    Glad you were able to figure out the problem. I have several friends with Anderson lowers and not one has had any issues. Strange.