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Thread: Upper and lower mating tolerances

  1. #31
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    Seems a little tight on the buffer. Just going by the pics it's a lower issue and not an upper. You got some excellent advise above. Use it and even if its registered, call spikes. See if they can fix it with the same serial number. If not, well you will just have to wait again on the damn ATF. These things can be a pain but its what we have.

    ETA: looking at pics, it doesn't look that bad. Then again I'm not pulling the pins. Your call.
    Last edited by fixit69; 07-31-14 at 16:30.
    "You cannot play fair with people who don't care if you get wiped off the map. You don't have to hate everyone who isn't part of your tribe, but it is foolish to keep caring about people who don't care about you."
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    See you soon, AC.

  2. #32
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    Quote Originally Posted by GH41 View Post
    Dumb question.... Have you tried closing it without the BCG, buffer and of course spring out of the gun??
    Yes, when I take out the bcg its closes without any problems. It's just the last 1/16 that seems to get tight,..once mated everything is functioning properly.
    Last edited by WaterChunker; 07-31-14 at 16:38.

  3. #33
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    Quote Originally Posted by fixit69 View Post
    Seems a little tight on the buffer. Just going by the pics it's a lower issue and not an upper. You got some excellent advise above. Use it and even if its registered, call spikes. See if they can fix it with the same serial number. If not, well you will just have to wait again on the damn ATF. These things can be a pain but its what we have.

    ETA: looking at pics, it doesn't look that bad. Then again I'm not pulling the pins. Your call.
    As far as squeezing the pins, I have it down now. I just squeeze the upper and lower together, push the take down pin out and while still squeezing the upper and lower together i pull the take down pin out on the hubbed side.

  4. #34
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    Quote Originally Posted by markm View Post
    This "some are tight... no big deal" crap is too quick of an assumption with all the garbage being rushed to market lately.
    Just to clarify, if you were speaking to me, I was talking about looseness only.

  5. #35
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    Quote Originally Posted by WaterChunker View Post
    this is as far as it goes without having to use a a hulk grip to seat them together at which point they "snap" together.
    Ok... I see the pics now. That is odd. You're beyond all the buffer/RE type issues so that's good. Now if the receivers close fine with the BCG out, I'm thinking the hammer is hitting something. Have you tried closing them with the BCG in and the hammer COCKED???
    "You people have too much time on your hands." - scottryan

  6. #36
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    Yea, same issue cocked and un-cocked.

  7. #37
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    Ok, with the bolt carrier out and the buffer in it mates no problem. With the bolt carrier in and the buffer out its hard to close and "snaps" together with applied force.

  8. #38
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    Try putting a thin film of grease on the face of the buffer and see if that helps.
    Train 2 Win

  9. #39
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    Ok I put in a cheap semi auto bcg and it mated with zero issues. I put my bcm fa bcg back in it and back to the mating issue. I'm over here at my fathers house, I took the BCM BCG out of his rifle and put it into mine and it mated with zero issues. I took my BCM BCG and put it into his rifles and it closed with zero issues. Very weird.
    Last edited by WaterChunker; 07-31-14 at 19:27.

  10. #40
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    Quote Originally Posted by WaterChunker View Post
    Yes, when I take out the bcg its closes without any problems. It's just the last 1/16 that seems to get tight,..once mated everything is functioning properly.
    Edit: saw your recent posts.

    Do you have a friend who has another FA BCG you can try on yours?
    Last edited by JusticeM4; 07-31-14 at 19:36.

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