Mounting an Eotec on a M4

This is a discussion on Mounting an Eotec on a M4 within the Defensive Rifles & Shotgun Discussion forums, part of the Related Topics category; Ok all you AR owners, witch way would you mount a eotec on your M4 with a regular front sight. Would you mount it right ...

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Thread: Mounting an Eotec on a M4

  1. #1
    Member Array bill35738's Avatar
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    Mounting an Eotec on a M4

    Ok all you AR owners, witch way would you mount a eotec on your M4 with a regular front sight. Would you mount it right to the receiver or use a spacer to put the front sight in the bottom of the eotec sight picture, and what is the pros and cons for either one?

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  3. #2
    VIP Member Array pittypat21's Avatar
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    Mount it right to the receiver. Why would you want it mounted higher?
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    Member Array beni's Avatar
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    It depends on the model you have. From my understanding the newer XPS models do not require the spacers to get the lower 1/3 co witness. If you have an XPS just mount it to the receiver.

    I suggest you read this post by jonconsiglio:
    Red Dots - Basic Use and Co-Witnessing

    It should answer your questions regarding lower 1/3 co witness and absolute co witness
    sammage and patri0t like this.

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    Member Array sammage's Avatar
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    Lower 1/3 cowitness for me, especially if you have a fixed rear sight.
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    Senior Member Array patri0t's Avatar
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    Quote Originally Posted by sammage View Post
    Lower 1/3 cowitness for me, especially if you have a fixed rear sight.
    I have to agree with the 1/3 co-witness whenever possible. I would NEVER rely solely on a red-dot for a Duty-Carbine or SD/HD. Stuff Happens.

    How not to have BUIS available? especially if your neck is on the line.
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    Member Array DonPablo_VA's Avatar
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    I much prefer a lower 1/3 co-witness. this gives you a good idea what an absolute and 1/3 co-witness would look like.
    EOTech lower 1/3 cowitness pictures/opinions - AR15.Com Archive

    http://www.weaponevolution.com/forum...ING-CO-WITNESS

  8. #7
    Member Array IsaiahM33's Avatar
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    My EoTech 512 was mounted directly to the receiver. At the expense of sounding like I'm name-dropping, a Delta guy showed me his rifle with EoTech AND spacer. I have to say it was much easier to aquire a proper sight picture faster. Not that it was difficult to do to begin with, but it was definitely a hair faster with the spacer. Your results may vary.
    "Those are my principles, and if you don't like them...well, I have others." - Groucho Marx

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    Member Array IsaiahM33's Avatar
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    Keep in mind this was in full gear, helmet and vest....and his was not an AR. It was a Hk 416. My personal AR does not have a spacer.
    "Those are my principles, and if you don't like them...well, I have others." - Groucho Marx

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    Senior Member Array Darrow75's Avatar
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    Whatever you do...don't mount it backwards.
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    VIP Member Array jonconsiglio's Avatar
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    Quote Originally Posted by Darrow75 View Post
    Whatever you do...don't mount it backwards.
    Unless you work for the US Marshals!
    gasmitty, Darrow75 and rocky like this.
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