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Thread: Cracked upper? Replace or shoot and forget?

  1. #21
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    Quote Originally Posted by Bruce in WV View Post
    Great idea. How expensive is that? Who does it?

    Does it make financial sense? Is there room in the cost/benefit tradespace to make it worthwhile instead of just changing it to a new upper receiver?
    Can you post pics of the inside of your upper for us to look at?

  2. #22
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    I'm anxiously waiting to get it back in my hands.
    I'll do that as soon as I get my hands on it.

  3. #23
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    Really doesn't look like a crack to me either but no one can be sure just by looking at a single picture.

    An LPI test would be your best bet if you want to be sure. I have seen cheap kits as low as $20 on the webs but your better kits are going to be $75 or more for one can each of penetrant, cleaner, and developer. If you happen to know somebody that works in a good machine shop, there is a good chance they would have the materials to do this in-house. An NDT company would probably charge you $100 minimum for this test.

    You could try this cheap DIY method which should expose a crack if its a bad one and open to the test surface.
    1. Soak the area of interest in some light penetrating oil for 30 minutes.
    2. Wipe the oil off with clean, dry rags until you can remove no more oil with the dry rags.
    3. Dampen but do not saturate a clean, dry rag with acetone or paint thinner. Wipe the suspect area back and forth a few times, but not to heavily.
    4. After acetone or thinner has evaporated, lightly blow or dust baby or talcum powder over this area. You don't want it snow white but you need enough powder to contact the suspect area.
    5. Evaluate suspect area after 5 to 10 minutes and see if any oil has has been absorbed into the powder.

    Good luck.

  4. #24
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    If it is a crack, it should show on the bottom with the recievers open and it would also show on the inside.
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

  5. #25
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    If you really don't know what it is, I would get it repaired or what ever.

  6. #26
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    Quote Originally Posted by Heavy Metal View Post
    If it is a crack, it should show on the bottom with the recievers open and it would also show on the inside.
    Agreed. I've got a couple of marks that look suspiciously like that on the inside of my BCM upper. The marks have no depth to them and appear to have happened before the upper went through the finishing process. I think it's either a tool mark or a scratch left by a burr on the tool bit during machining.

    Shine a bright light on it and look at it under a magnifying glass to see if it's "finished" over by the anodizing, or if it interrupts the finish.

    I wish you had posted a larger pic, but I bet it's a cosmetic flaw.

  7. #27
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    Clearly a scratch under the anodizing

    The armorer gave it a thorough going over and a clean bill of health as a scratch under the anodizing. I'm not even going to pick it up (so no follow up pictures - sorry); its going straight to consignment.

  8. #28
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    Quote Originally Posted by Bruce in WV View Post
    Returning it to Armalite would be at my expense - both directions - and be a full cost repair ($133 plus labor).
    Really??? That seems like a bad deal on their part.


    C4

  9. #29
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    Quote Originally Posted by Bruce in WV View Post
    I inquired at Armalite before doing anything else. Their policy is very clear. Only the original owner has a warranty, and even then, you only have a warranty if you fill out the card that comes with the gun and it is properly mailed in to them. They were polite, but firm, and their policy is clearly stated in their FAQ.
    Just FYI. The warranty card condition may not be legal. Some states prohibit that (requiring a registration be sent in as condition of warranty). I know you are not the original owner but wanted to put this in for posterity's sake if someone comes across this thread in the future.

    I'm on my own, but I'm OK with that. Its just part of the give and take when you're in this hobby.
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  10. #30
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    Quote Originally Posted by Bruce in WV View Post
    The armorer gave it a thorough going over and a clean bill of health as a scratch under the anodizing. I'm not even going to pick it up (so no follow up pictures - sorry); its going straight to consignment.
    Well thats good!

    It seemed like a strange place for a crack....

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