What’s this Proof Mark
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Thread: What’s this Proof Mark

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    Default What’s this Proof Mark

    I just saw a picture of an M27IAR upper in one of Nefarious Arms threads. The upper is marked with a “P” in a square where the usual Eagle over N or CIP proof mark is.
    -e9b9d201-36af-4d9a-85bd-7ca743fc20dc.jpg
    In doing a little research, I found the “P” in square proof marks were used in the past to show a rebuild of a military weapon.
    -2de27354-484d-4f19-a591-fa6606c0bd1d.jpeg
    Anyone know if this is a genuine proof mark or just something the assembler used on these uppers for his or her own purposes?

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    That proof is in the newer MR556/MR762 rifles, not sure what it signifies.

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    Quote Originally Posted by illicit View Post
    That proof is in the newer MR556/MR762 rifles, not sure what it signifies.
    I find that interesting because it would seem to violate the CIP rules used throughout Europe. I also notice the lack of a proof house stamp, which for the HK416 has always been the antler signifying Ulm. The BF would indicate a 2015 date. I’m guessing then that these newer uppers are not coming out of Germany.

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    AGG
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    The "P" inside the "bell" is the proof mark for proofing conducted in the U.S.--- the "bell" is the Capitol Dome of the New Hampshire State House--- I cannot remember the "P" inside the "square" being answered, but most likely a U.S. proof mark!!!

    Tony
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    Quote Originally Posted by AGG View Post
    The "P" inside the "bell" is the proof mark for proofing conducted in the U.S.--- the "bell" is the Capitol Dome of the New Hampshire State House--- I cannot remember the "P" inside the "square" being answered, but most likely a U.S. proof mark!!!

    Tony
    Georgia state house


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    Quote Originally Posted by Surefire44 View Post
    I find that interesting because it would seem to violate the CIP rules used throughout Europe. I also notice the lack of a proof house stamp, which for the HK416 has always been the antler signifying Ulm. The BF would indicate a 2015 date. I’m guessing then that these newer uppers are not coming out of Germany.
    The image in your first post is a MR556 upper. The MR556 uppers do not have the CIP and antler markings on the upper receiver itself.

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    Illicit—I don’t doubt what you’re saying. The proof mark is seen on what appears to be am M27IAR marked clone. I can only assume the USMC serial number was put there by the person assembling the clone. I was really trying to find out if this was what the marines are now receiving:
    -0a1280da-45e2-46eb-9f58-5b78f7b3beef.jpg

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    Quote Originally Posted by Surefire44 View Post
    Illicit—I don’t doubt what you’re saying. The proof mark is seen on what appears to be am M27IAR marked clone. I can only assume the USMC serial number was put there by the person assembling the clone. I was really trying to find out if this was what the marines are now receiving:
    I see what you are asking now. I'm not sure if the markings have changed for actual M27s.

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