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Thread: Did I ruin my lower receiver?

  1. #31
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    Quote Originally Posted by M4Guru View Post
    Always grind the cheap part!

    Exactly.

    In the big scheme of things this still ends up being a nonevent and a learning story.
    Last edited by Stickman; 06-12-12 at 14:03.
    Stick


    Board policy mandates I state that I shoot for BCM. I have also done work for 200 or so manufacturers within the firearm community. I am prior service, a full time LEO, firearm instructor, armorer, TL, martial arts instructor, and all around good guy.

    I also shoot and write for various publications. Let me know if you know cool secrets or have toys worthy of an article...


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  2. #32
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    Quote Originally Posted by AR15barrels View Post
    This is exactly what I expected would happen...
    Yep.

    and this time gring the cheap part!

  3. #33
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    Quote Originally Posted by M4Guru View Post
    Yep.

    and this time gring the cheap part!
    If you read the rest of that post, you know that no grinding was needed this time. I ran degreaser and a shop towel through to get rid of the Aluma-Hyde, covered it with a Birchwood-Casey marker and reassembled. It works fine, now.

    BTW, I do think the whole process I did today helped. I think there were still a few small metal filings in the channel from the grinding last night and that is why it still didn't feel quite right even though it was working by then. Flushing the channel with degreaser washed them away and now it is much smoother. Now that the black from the marker has dried, you can't tell anything ever happened. Phew!
    Last edited by frogger; 06-12-12 at 14:21.
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  4. #34
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    BTW, let me be clear about something. I'm not blaming Rainier Arms for this issue. First, even though it seemed to me that it was the fault of the lower and not the bolt catch, I can't be sure which part was out of spec. Second, the people at Rainier Arms have always been great to deal with and fast to reply to emails so I will still buy from them in the future. Even if it was their lower that was the culprit, any company can let a bad item out the door occasionally. No company has a 100% QC record. Their track record from other items I've bought and all the posts I've seen of their products is very good.
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  5. #35
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    When you say you are testing the bolt catch with a different upper, what exactly do you mean? It sounds to me like you're making a decision on whether it works or not by inserting an empty magazine and working the charging handle, is this correct?

    If so, that tells you very little about whether it's working correctly or not. Your way of checking the catch allows a lot of time for the follower to engage the catch. With live ammo, it may be a different story.

    I wouldn't touch anything else right now. I'd test it at the range. Then, whether it works or not, I'd order an LMT or Colt bolt catch and go from there. If the new one didn't fit, it would be likely that it was a receiver issue. But, that will be hard to tell now.
    Proven combat techniques may not be flashy and may require a bit more physical effort on the part of the shooter. Further, they may not win competition matches, but they will help ensure your survival in a shooting or gunfight on the street. ~ Paul Howe

  6. #36
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    Quote Originally Posted by jonconsiglio View Post
    When you say you are testing the bolt catch with a different upper, what exactly do you mean? It sounds to me like you're making a decision on whether it works or not by inserting an empty magazine and working the charging handle, is this correct?
    Yes.

    If so, that tells you very little about whether it's working correctly or not. Your way of checking the catch allows a lot of time for the follower to engage the catch. With live ammo, it may be a different story.

    I wouldn't touch anything else right now. I'd test it at the range. Then, whether it works or not, I'd order an LMT or Colt bolt catch and go from there. If the new one didn't fit, it would be likely that it was a receiver issue. But, that will be hard to tell now.
    As I've said, I will test it at the range, but I don't have a trigger group for it yet. Once I have the trigger, I'll do further testing. Unfortunately, financial restraints mean I won't have a trigger group for 1 -2 months.
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  7. #37
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    Quote Originally Posted by frogger View Post
    BTW, let me be clear about something. I'm not blaming Rainier Arms for this issue. First, even though it seemed to me that it was the fault of the lower and not the bolt catch, I can't be sure which part was out of spec. Second, the people at Rainier Arms have always been great to deal with and fast to reply to emails so I will still buy from them in the future. Even if it was their lower that was the culprit, any company can let a bad item out the door occasionally. No company has a 100% QC record. Their track record from other items I've bought and all the posts I've seen of their products is very good.
    There IS a way to tell. Measure the thickness of the bolt catch and then compare it to others.


    C4

  8. #38
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    Quote Originally Posted by C4IGrant View Post
    There IS a way to tell. Measure the thickness of the bolt catch and then compare it to others.


    C4
    Tell you what... you send me a micrometer and a Colt or LMT bolt catch and I'll let you know the results.
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  9. #39
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    Quote Originally Posted by frogger View Post
    Tell you what... you send me a micrometer and a Colt or LMT bolt catch and I'll let you know the results.
    Decent micrometers can be had for much less money than replacing a lower. And you could ask anyone on this forum to measure there colt/bcm/lmt bolt catch to get what size it should be.

  10. #40
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    Quote Originally Posted by Grizzly16 View Post
    Decent micrometers can be had for much less money than replacing a lower. And you could ask anyone on this forum to measure there colt/bcm/lmt bolt catch to get what size it should be.
    Right or just borrow some from a friend.


    Most any gun shop will have some as well.


    C4

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