Small set screw fell out of my upper while cleaning and I have no idea where it goes

Discussion in 'AR-15 Discussion' started by mkhatcher, Nov 22, 2015.

  1. mkhatcher

    mkhatcher New Member

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    Hi, can anyone tell me where this screw goes? Thank you in advance!

    [​IMG]
     
  2. FrontierTCB

    FrontierTCB Active Member

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    Is it a screw threaded? Couple more pics at different angles would help.


    Sent from a phone I can use to do my taxes, but can't make a damn call.
     

  3. Mercator

    Mercator New Member

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    Looks like a bolt catch screw. What caliber is the upper?
    Added--would be a plunger if not threaded.
     
    Last edited: Nov 22, 2015
  4. mkhatcher

    mkhatcher New Member

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    Thanks guys! The upper part is threaded like a set screw and the longer part seems to be just a stem. Its a DPMS .223/5.56. Thank you
     
  5. FrontierTCB

    FrontierTCB Active Member

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    Do you have any optics or rail mounts it cold have come from?

    If you can take another pic lay a coin next to it so we can estimate the size.

    As stated above its shaped like a bolt catch plunger but never seen one threaded and of course that is in the lower rec.


    Sent from a phone I can use to do my taxes, but can't make a damn call.
     
  6. Mercator

    Mercator New Member

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    DMPS uses a threaded bolt catch in a 308.
     
  7. JonM

    JonM Moderator

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    what model dpms. dpms is known for using nonstandard parts. it could be anything. need a pic of the gun itself, good close ups of the lower and upper each side and exact model number
     
  8. FrontierTCB

    FrontierTCB Active Member

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    I'm aware. OP stated it was a 5.56. He also said he thought it fell out of the upper. Bolt catch is in lower.




    Sent from a phone I can use to do my taxes, but can't make a damn call.
     
  9. TheSadPanda

    TheSadPanda New Member

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