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AR-15 lower parts kit

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6 comments

  • 7.62x39Lover
    Hi guys.
    How do you know if you have a "large pin" or "small pin" lower receiver? My lower is mil-spec. I want to buy a parts kit for it.
    0
  • tsr1965
    Usually, unless it is a very early COLT PRE-BAN, they are small pin. What make is your reciever? When was it made? If you have caliper's, measure an existing pin or the hole...small pin is 0.154", and the large pin is 0.170".

    Best
    0
  • 7.62x39Lover
    It is Palmetto State Armory, mil-spec, brand new production. I pick it up from FFL tomorrow. I have no calipers.
    0
  • rufe-snow
    New mil spec production, probably small pin.

    Use the shank of a 5/32 drill as a gauge, if you have one. Won't go into a small diameter hole receiver. Will be loose and sloppy in a large hole receiver.
    0
  • cpermd
    Small
    MilSpec

    CP
    0
  • 7.62x39Lover
    Thanks again guys. Will go with the small pin lower kit.
    0

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