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Thread: Aimpoint M5 Scalar Works 1.93 (lower third) mount magnifier?

  1. #11
    Quote Originally Posted by javemtr View Post
    Unfortunately these measurements don't seem to be standardized.
    They aren't, as "lower 1/3" isn't a standardized height.

    A couple more data points;

    Geissele absolute: 1.41"
    Geissele lower 1/3: 1.54"

    Trijicon absolute: 1.53"
    Trijicon lower 1/3: 1.66"

  2. #12
    Member
    Join Date
    Nov 2018
    Location
    Germany
    Quote Originally Posted by texasaggie2005 View Post
    They aren't, as "lower 1/3" isn't a standardized height.
    That part I can understand. But why can different manufacturers not even agree on what absolute co-witness is? Shouldn't this be defined clearly by some AR-15 technical spec?

    Scalarworks: 36 mm
    Aimpoint: 39 mm
    Spuhr: 38 mm
    Geissele: 36 mm
    Trijicon absolute: 39 mm

  3. #13
    Site Supporter dontshakepandas's Avatar
    Join Date
    Jun 2014
    Location
    Dallas, TX
    Quote Originally Posted by javemtr View Post
    That part I can understand. But why can different manufacturers not even agree on what absolute co-witness is? Shouldn't this be defined clearly by some AR-15 technical spec?

    Scalarworks: 36 mm
    Aimpoint: 39 mm
    Spuhr: 38 mm
    Geissele: 36 mm
    Trijicon absolute: 39 mm
    Nope, which is the reason this thread exists in the first place. It makes it a real pain to try to mix and match mounts from different manufacturers.

  4. #14
    Firearms community isn't exempt;




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