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Thread: LMT 10.5 inch Problems after PWS FSC 556 Install?

  1. #11
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    Quote Originally Posted by bkb0000 View Post
    because you can gut a Colt thats not working right and fill it with LMT parts and it's just as likely to work right.

    you're a purist, and i respect that.. but claiming LMT is "sub-standard" is bullshit. the INDUSTRY standard is far below what LMT is doing.

    I can guarantee you with 90% certainty that if the BCG, buffer, and spring was replaced with Colt in the OPs rifle, the rifle would work.

    My new way of fixing ARs hardly ever fails.

    I quit trying to chase around chronic problems with aftermarket stuff and trips to the range for testing and just replaced the stuff with USGI and move on.

    You guys can do what you want.
    Last edited by scottryan; 03-15-10 at 23:40.
    "Not every thing on Earth requires an aftermarket upgrade." demigod/markm

  2. #12
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    I have been utterly unsatisfied with my half dozen LMT uppers and LMT customer service's response to issues with an LMT upper.

    10.5s are sketchy to begin with, an LMT 10.5 (yes, I've owned one) is double sketchy.

    My solution would involve dumping the entire upper for a quality 11.5" upper. I am partial to BCM for that.

  3. #13
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    Quote Originally Posted by 87GN View Post
    I have been utterly unsatisfied with my half dozen LMT uppers and LMT customer service's response to issues with an LMT upper.

    10.5s are sketchy to begin with, an LMT 10.5 (yes, I've owned one) is double sketchy.

    My solution would involve dumping the entire upper for a quality 11.5" upper. I am partial to BCM for that.
    i'm finding it difficult to accept this post at face value. mind elaborating a bit?

  4. #14
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    Quote Originally Posted by bkb0000 View Post
    i'm finding it difficult to accept this post at face value. mind elaborating a bit?
    They refused to even look at the upper unless it had been purchased directly from a dealer.

  5. #15
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    Most likely an extractor issue given the type three malfunctions you're getting (double feeds)... what buffer are you using? Meaning change out the extractor spring and possibly the extractor itself. Or replace the bolt (meaning you get a new extractor and spring).

    Regarding changing to Colt, it has nothing to do with it being Colt v. LMT v. anybody else... rather it has to do with choosing quality over hit-and-miss quality.

  6. #16
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    Quote Originally Posted by scottryan View Post
    ...
    And an LMT is certainly substandard compared to Colt in the stock hardware and BCG with MIM gas key issues.
    If OP purchased the BCG a couple of years ago, the so called MIM issue may not be a problem for him. Or anyone else for that matter. Save the errornet hype for TOS.

  7. #17
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    I would try an H2 buffer.

  8. #18
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    Thanks guys! Wow, I didn't expect all of this, which is fine though, gets guys thinking. As far as my BCG, it was purchased before the MIM gas keys and the BCG was purchased new and only has about 300-400 rounds through it, so I can't see that it's a BCG or extractor issue. I have already ordered an H2 buffer to give it a try. I agree with bkb0000 that the rifle was probably borderline to begin with and the FSC556 just pushed it over the edge. For what it's worth, I LOVE my MRP and wouldn't give it up for anyhing! With the 14.5 inch barrel, which is how I run it 99.99% of the time, runs like a sewing machine. I'm sure that it'is something simple, I just needed some help with diagnosing since this is my first SBR. I have a spare extractor spring kit that I will try also.

    Thanks guys

  9. #19
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    Quote Originally Posted by spamsammich View Post
    If OP purchased the BCG a couple of years ago, the so called MIM issue may not be a problem for him. Or anyone else for that matter. Save the errornet hype for TOS.

    I still wouldn't trust it.
    "Not every thing on Earth requires an aftermarket upgrade." demigod/markm

  10. #20
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    Swapping out the carrier with a known good one is one of the first things to do when trouble shooting.

    Even a Colt carrier can have one of the carrier key bolts fail and being properly staked makes it very hard to see.

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