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AR 15 Key hole upper????

Discussion in 'General Firearm Discussion' started by finch6013, Apr 21, 2009.

  1. finch6013

    finch6013 Oregon City Active Member

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    I see alot of uppers advertised as key hole uppers. Mine has this marking and I would like to know what it means. Thanks for you help
     
  2. MacBookProAR

    MacBookProAR Stayton Member

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    It is the forge marking which identifies who made the original maker is. Keyhole is a more common one and is used by many manufacturers in the forging process.
     
  3. Doubletap

    Doubletap Newberg Well-Known Member

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    Actually..the "keyhole" is exclusively used by Cerro Forge..who happens to make high quality upper receivers..for a good number of better AR manufacturers..
     
  4. finch6013

    finch6013 Oregon City Active Member

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    Thanks for the info. My DelTon has a keyhole upper. assuming the keyhole looking mark is what everyone is talking about
     
  5. USMC1911

    USMC1911 Salem Active Member

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    Yup thats what everyone is talking about. My S&W upper has the same marking.
     
  6. finch6013

    finch6013 Oregon City Active Member

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    sounds like they pretty much all have it. Maybe its not so special after all