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Possibly silly question re BC

Discussion in 'Black Rifle Forum' started by JASV.17, Feb 8, 2010.

  1. JASV.17

    JASV.17 Prime Example

    4,913
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    Jul 10, 2007
    In regards to to lube, I read a fair amount of some people adding a few drops/squirts of lube via the holes in the side of the BC through the ejection port when running their ARs.

    My question is....is this what these holes are for, or do they serve another purpose and this is an "added benefit" of them?

    Sorry if a stoopit question, I was just curious.
     
  2. La26

    La26

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    Aug 2, 2008
    Louisiana
    I'm not really sure if the holes are there strictly for lubing purposes, but I like to move the bolt forward and back until I can see the silver gas rings in the holes. I then put drop of lube in each hole, so that the rings get some lube on them. Also, a drop or two down the gas key (spout?).
     


  3. NeverMore1701

    NeverMore1701 Fear no Evil Platinum Member

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    Jun 25, 2004
    Amarillo, Tx
  4. deMontacute

    deMontacute NRA Member

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    Oct 15, 2007
    Louisiana
    They are where the gas vents out of the piston chamber...
     
  5. Onmilo

    Onmilo

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    Jul 10, 2005
    Illinois
    ^^^^THIS^^^^
    The holes act a a pressure relief when the bolt cams to the rear of the carrier during the cycle stage.