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  1. #1
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    50 yard Zero

    Hello, Everyone

    I've been doing research one which Zero would be best overall for a M4; so far I have gotten alot of people are saying to go with a 50 yard Zero vs the U.S Army's Standard 25 yard zero.

    I found the following data: (from AR15armory.org)

    " If You want to shoot 15-100y for most of your shooting. With your current zero you will be ~6" high at 100y depending on barrel length and ammo. Since 25y is your zero, everything beyond that will be high, ~2.2" high at 50y, 6" at 100y, ~8" high at 150y and ~9" high at 200y. Your numbers will be worse than a Mil zero (numbers given by TS above) because that zero target you used is really a 31y zero because it requires adding elevation to zero (the z setting on the elevation knob on the carry handle iron sights, 8/3 or 6/3+ 1) and then backing down to 8/3 or 6/3 for your battlesight zero.

    If you use a 50y zero, then you will be ~1.2" low at 25y, dead on at 50y, ~1.5" high at 100y, ~.5" high at 200y. See these charts for a very good description and recommendations from the Army Marksmanship Unit. AMU zeroing data "

    http://www.usaac.army.mil/amu/Servic...-M4%20data.pdf

    http://www.eotech-inc.com/documents/...LBS_Target.pdf

    I'm Using a Eotech 511, on a yankee hill raiser; iron sights are alerady zero'd. Just trying to figure out how to get setup here.

    Does anybody know if they make 50 Yard laser boresight Target Like the Eotech one ? I know some People in the Army/Military have a AKO account with different documents or files for Targets i heard.
    Last edited by skunkhaze; 09-30-10 at 14:43.

  2. #2
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    I am a big fan of the 50 yard zero. My dept uses them on our patrol rifles and it is the best zero for a carbine IMO.

    No need to mess with your sights from 0-300 yards. 400 yards requires a bit of hold over but not to bad.
    C co 1/30th Infantry Regiment
    3rd Brigade 3rd Infantry Division
    2002-2006
    OIF 1 and 3

    IraqGunz:
    No dude is going to get shot in the chest at 300 yards and look down and say "What is that, a 3 MOA group?"

  3. #3
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    hmm the max rise on a 25 yard zero is 7"? Other charts I've seen say its a rise of 10"

    I like the 50 yard zeros myself

  4. #4
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    What would be the best way to setup a M4 for a 50 yard zero? Can't seem to find any laser boresight targets for 50 yards for red-dots/eotechs
    Last edited by skunkhaze; 09-30-10 at 14:30.

  5. #5
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    Setup a bullseye target at 50y and shoot it...

    There's been a few threads on this, checkout the optics subforum.

    Here's a good thread and a pdf to start you out.
    https://www.m4carbine.net/showthread.php?t=35064

    http://grburnett.us/guns/ImprovedBattlesightZero.pdf
    Last edited by devilsdeeds; 09-30-10 at 14:58.

  6. #6
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    Quote Originally Posted by skunkhaze View Post
    What would be the best way to setup a M4 for a 50 yard zero? Can't seem to find any laser boresight targets for 50 yards for red-dots/eotechs
    Start close 10-20 yards get on the paper then move back some more shoot repeat before you know it your sighted at 50 yards. Sandbags and a makeshift bench are what I use for the fine tuning. You can draw a dot on a peice of paper or cardboard and aim at it. No need for special targets. With good optics i like to shoot a hole then aim for it to make little groups...fun

  7. #7
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    Quote Originally Posted by skunkhaze View Post
    What would be the best way to setup a M4 for a 50 yard zero? Can't seem to find any laser boresight targets for 50 yards for red-dots/eotechs
    remove the upper and the bcg from the upper. secure the upper in a solid rest. look through the bore at something at 50 yds. bring the sight into alignment with that. confirm by actually firing the gun...
    never push a wrench...

  8. #8
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    Thumbs up The old school way

    I do the old school zero as ra2bach mentioned. Most shooters in this area want a 100 yard zero. So my zero is a little different but the mechanics are just about the same. I use a 1 1/2 blaze orange paste at 100 yard and refer scope to barrel picture. I have a periscope that fits in the chamber for my aging eyes. I would also say that zero is more or less mission/shooter specific and you can't say that one is better then the other. I'm old Corps, and now my shooting days are more of metal and paper targets so I use the old 300 yard zero(scopes and irons, red dot is at 100). But I'm sure it's not what a LEO or CQB guy would want to use.
    To each his own and what gets the job done.

    Stay safe gents.

  9. #9
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    I have used 300 yard zeroes (BZOs), 50 yard zeroes, 200 yard zeroes, 100 yard zeroes, and all the above in meters as well.

    For shooting out to 200 meters, I have found the 100 yard/meter zero to be the easiest to deal with as far as hold-overs go if using an optic. You don't have to deal with any hold-unders for the entire trajectory, it is twice as forgiving at close range as far as hold-over goes, has the longest portion of POA/POI, and that POA/POI is at the most relevant threat distance where POA/POI most benefits the shooter. Further, most magnified optics with a BDC or range-relevent elevation adjustments are zeroed at 100, therefore there is more inherent crossover skill when changing between optics/guns.

    A lot of shooters drastically overestimate their effective engagement range with M4 type weapons, or assume that if most threats will be inside 25 yards that a 25 yard zero will make the most sense. Both errors cause the shooter to have to deal with more things to compute when bullets need to find their mark. It's a lot easier to do on a flat range with clearly marked firing lines and distances with mental prep time and low stress. It is a much different problem when in the middle of a gunfight. Weighing zero against zero, and simply numbering pro's against con's does not give sufficient weight to the most pressing and life-threatening aspects. If you can have targets appear at unknown distances between 3 and 100 meters and be able to apply your hold-off to achieve a hit on the CNS without hesitation (and be correct), you and your zero are in harmony. If you can't, or if your hold-offs are tied to numerical distances in your memory, you are not. What it boils down to (to me) is that achieving that harmony is easier with a 100 meter zero than any other.
    Jack Leuba
    Director of Sales
    Knight's Armament Company
    jleuba@knightarmco.com

  10. #10
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    Quote Originally Posted by skunkhaze View Post
    Hello, Everyone

    I've been doing research one which Zero would be best overall for a M4; so far I have gotten alot of people are saying to go with a 50 yard Zero vs the U.S Army's Standard 25 yard zero.

    I found the following data: (from AR15armory.org)

    " If You want to shoot 15-100y for most of your shooting. With your current zero you will be ~6" high at 100y depending on barrel length and ammo. Since 25y is your zero, everything beyond that will be high, ~2.2" high at 50y, 6" at 100y, ~8" high at 150y and ~9" high at 200y. Your numbers will be worse than a Mil zero (numbers given by TS above) because that zero target you used is really a 31y zero because it requires adding elevation to zero (the z setting on the elevation knob on the carry handle iron sights, 8/3 or 6/3+ 1) and then backing down to 8/3 or 6/3 for your battlesight zero.

    If you use a 50y zero, then you will be ~1.2" low at 25y, dead on at 50y, ~1.5" high at 100y, ~.5" high at 200y. See these charts for a very good description and recommendations from the Army Marksmanship Unit. AMU zeroing data "

    http://www.usaac.army.mil/amu/Servic...-M4%20data.pdf

    http://www.eotech-inc.com/documents/...LBS_Target.pdf

    I'm Using a Eotech 511, on a yankee hill raiser; iron sights are alerady zero'd. Just trying to figure out how to get setup here.

    Does anybody know if they make 50 Yard laser boresight Target Like the Eotech one ? I know some People in the Army/Military have a AKO account with different documents or files for Targets i heard.
    300 meter zero is the standard Army Zero. The 25 yard zero is used to approximate a 300M zero, for time saving purposes. Same as for the 50M or yard zero is used for a 200 (225) yard zero. It's damn close, but you should always zero at the furthest distance as a final check.
    For God and the soldier we adore, In time of danger, not before! The danger passed, and all things righted, God is forgotten and the soldier slighted." - Rudyard Kipling

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