Privacy guaranteed - Your email is not shared with anyone.

Welcome to Glock Forum at

Why should YOU join our forums?

  • Connect with other Glock Enthusiasts
  • Read up on the latest product reviews
  • Make new friends to go shooting with!
  • Becoming a member is FREE and EASY

Glock Talk is the #1 site to discuss the world’s most popular pistol, chat about firearms, accessories and more.

Co witness with Primary arms

Discussion in 'Black Rifle Forum' started by Fwdftw, Jan 6, 2011.

  1. Fwdftw


    Apr 18, 2009
    Hernando MS
    What is needed to co witness with the primary arms micro dot? i know ive seen in some videos they were saying that it wasnt possible? I just want the dot on the front sight post like my eotech was. and to co witness with my MBUS thanks!
  2. My PA Micro co-witnesses perfectly on my AR using the quick disconnect riser that cost a little extra. When I flip up my BUIS and aim using them, the dot sits right on the front post, as it should.

  3. lawboy


    Jan 22, 2010
    ^ This. I have the Micro Dot with the Primary Arms QD mount and the Magpul MBUS, which allows for a 1/3 co-witness.
  4. NeverMore1701

    NeverMore1701 Fear no Evil Platinum Member

    Jun 25, 2004
    Amarillo, Tx
    I think because of the location of the emitter, only a lower 1/3 cowitness is possible, not an absolute cowitness. I have mine on an ADM mount that's supposed to be absolute with a real T1, but is lower 1/3 with the PA. I don't really care either way.
  5. faawrenchbndr

    faawrenchbndr DirtyThirty fan CLM

    Nov 24, 2005
    I have a Larue Tactical mount for my PA, LT660HK.
    It provides absolute cowitness
    Last edited: Jan 7, 2011
  6. MARSH1

    MARSH1 Dealer Silver Member

    May 21, 2007
    The video is of a older design. The current removable base Micros and our Riser work great.

  7. Being kinda new to this, I have a related co-witnessing necessary or is it simply an option for those with the FSB?
  8. MARSH1

    MARSH1 Dealer Silver Member

    May 21, 2007
    Cowitness is the ability to see your iron sights, when they are lined up, through the red dot sight window. This thread explains it. You will need the riser on a AR or it would be way too low.
    Last edited: Jan 6, 2011
  9. Whiskey Six

    Whiskey Six Marine 0369 Platinum Member

    Jul 25, 2007
    I think the OP wants absolute co witness with the red dot on top of the front sight post. Not lower 1/3. Is this possible? I am also curious.

    Nevermind. I just read the above link. Good explanation.
  10. Boxerglocker

    Boxerglocker Jacks #1 Fan

    Mar 6, 2003
    Lynnwood, WA

    Excellent illustration
    Last edited: Jan 7, 2011