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Thread: Problem with a new BCM lower

  1. #71
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    This isn't a TDP thread or speculation about who has what.



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  2. #72
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    Quote Originally Posted by Iraqgunz View Post
    This isn't a TDP thread or speculation about who has what.
    IG: Got it. The question I had concerned how (according to the OP) BCM could state that their lower conformed to the TDP when the TDP is supposedly confidential and proprietary. I believe that is resolved.
    'That whole effort was held together by sweat, shame, and a tiny bit of pride.' -- Son of Commander Paisley

  3. #73
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    There is nothing confidential or proprietary about the dimensions of an AR receiver.

  4. #74
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    Quote Originally Posted by C4IGrant View Post
    I have read about this issue before. So here is the rule of thumb. If a lower works 100% with a USGI mag, but doesn't work with an after market mag, it is NOT the lower at fault. Now with that said, it is pretty common for BCM lowers to work with GEN 3 PMAG's, but every so often there will be tolerance stacking and they wont. As with ANY gun, always check the mags and ammo for optimal compatibility. If an after market brand does not work in your gun, stop using that ammo or mag. Problem solved.

    The above was not written to the OP (as he knows all of this), but to the people that might fine fault with BCM or even Magpul.



    C4
    I was about to respond and then I saw Grant's post - spot on and I agree 100%. I will add it is totally unreasonable to ask a manufacturer to warranty or replace a lower that is within specifications just in the hopes that a replacement lower might fit a non milspec magazine. Anybody on that train of thought doesn't understand what it is like to run a manufacturing firm in this day and age and needs an economic lesson.

  5. #75
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    I remember not too long ago when many brands were trashed on this and other sites for not allowing a PMAG to drop free. Much less FIT. The stances have changed more than Hillary on gay marriage.

  6. #76
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    Quote Originally Posted by Bruce in WV View Post
    The solution sounds easy enough. Please post a photo for us that shows where to modify the lower and suggest a metric a little more precise than "a few file strokes". That would be really helpful.


    Here are some photos with yellow tape to show where the tab interfaces. The bottom pic shows that with loaded mag inserted, the tab should not be contacting the lower or trigger guard. If I were the OP, I would look to see if the tab is contacting the trigger guard, or the lower. Sometimes the trigger guard sits higher than the lower, so it would be contacting the tab. File the affected area (trigger guard or lower) until a gap is present with a loaded and seated mag.

  7. #77
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    Wouldnt it be simpler to file the magazine?
    If there is no enemy within the enemy outside can do us no harm

  8. #78
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    It would be simpler, but it would not work for the OP's needs. Read post #19
    Quote Originally Posted by black22rifle View Post
    Wouldnt it be simpler to file the magazine?

  9. #79
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    Quote Originally Posted by black22rifle View Post
    Wouldnt it be simpler to file the magazine?
    Reread the entire thread.
    Quote Originally Posted by JSantoro View Post
    Stop dicking the dog, please. It's gross.

  10. #80
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    Quote Originally Posted by black22rifle View Post
    Wouldnt it be simpler to file the magazine?
    Did you read the thread?

    Do you expect the OP to carry around a file in case one of his teammates happens to hand him a Gen 3 PMAG and then he is going to stop what he is doing to ensure proper fitment??

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