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    Question Improved Battlesight Zero

    In Lt. Colonel Santose explanation of exceptions to battlesight zero (in TM9-1005-319-10), he states in paragraph 6 line 2 "Small aperture, nose to firing handle weld."
    Can someone explain, to this noob, what this means? Do you sight in with the small un-marked aperture or the large, marked 0-2 aperture?

    http://grburnett.us/guns/ImprovedBattlesightZero.pdf

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    Depends on the range at which you zero and the type of sighting system- M16a1 or M16a2, plus some a1's have two small apertures, but some have one small and one HUGE- bigger even than the a2 variant. Also, carbine or rifle?

    The military zero also assumes the appropriate ammo for the platform- M193(early) or M855(current).
    Last edited by jmoore; 01-14-2010 at 05:14 AM.

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    Your nose touches the carry handle. This gives you the correct eye to aperature distance. Use the small aperature to eliminate error in sight picture. The large aperature is close quarter low light. The small aperature is deliberate and long range...to eliminate sight picture error.

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    Thread Starter
    Quote Originally Posted by jmoore View Post
    Depends on the range at which you zero and the type of sighting system- M16a1 or M16a2, plus some a1's have two small apertures, but some have one small and one HUGE- bigger even than the a2 variant. Also, carbine or rifle?

    The military zero also assumes the appropriate ammo for the platform- M193(early) or M855(current).
    I am sighting in an Armalite M15A4, 16 in barrel with both detachable carry handle and front sight at 50 yards (IAW Lt. Colonel Santose instructions). Ammo is Swissicon surplus 5.6mm Gw Pat 90 (63 gr?). This is the only ammo I currently have.

    Quote Originally Posted by browningautorifleicon View Post
    Your nose touches the carry handle. This gives you the correct eye to aperature distance. Use the small aperature to eliminate error in sight picture. The large aperature is close quarter low light. The small aperature is deliberate and long range...to eliminate sight picture error.
    Thank you for clearing this up!

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    In this case, drive on, everything is proper to each other. There's so many changes over the years to the platform that exceptions can easily crop up. Not a problem here.

    BTW work w/ the nose forward position if you can. It is easier to maintain uniform head position this way, for most folk. I now do better w/ a head rearward position for deliberate work, but its slower. If your head is not in the same place for shot to shot (talkin' small changes, here) your POI will shift, ruining the shot! The small aperature minimizes the potential unnoticed error.

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    Smile

    A little more info on 50/200 yard AR zeroing . Includes a link ( Post 3 by nickdrak ) to a very good 25/50/200 target that can also be used for 25/100.

    Easy way to zero your rifle - M4Carbine.net Forums



    Here's a direct link to the target:

    http://www.lawofficer.com/Images/100...tcm22_1587.pdf

    M4carbine.net has a very high density of pro's in their various fields . The main focus is work guns , gear and ammo , but hobby and legit defensive shooters are welcome.

    ETA:
    The usual disclaimer: 25 yard/meter zero is just a starting point. Confirm zeros at the longer ranges , if at all possible.
    End ETA.


    IMO , m4 is head and shoulders over the other " for pay '" AR site in terms of reliable , useful info with a minimum of useless fluff....
    YMMV.
    Last edited by campperrykid; 03-16-2010 at 10:42 AM.

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