So, I got asked, by PM, how to zero an AR typoe rifle, an A2 type sight.
Well, I got out my trusty M16A2 zero target, scanned it, and here we go. The target is attached, it's a .jpg photograph. I'll look into making it a printable .pdf file.
The directions are very simple, and are on the target. Make ALL elevation adjustments with the front sight, and the clicks are just over 1 MOA. Make the windage adjustments with the windage knob, and the are about 1/2 half MOA. The squares on the target are 1 CM (centimeter), and 2.5 of them make 1 inch.
The same target works for the M4, the values are different, and instead of using the 8/3 mark, it will be 6/3, assuming it's a real M4 sight.
The FM can be found here: https://atiam.train.army.mil/soldierPortal/atia/adlsc/view/public/6712-1/fm/3-22.9/FM3_22X9.PDF (https://atiam.train.army.mil/soldierPortal/atia/adlsc/view/public/6712-1/fm/3-22.9/FM3_22X9.PDF)
I suggest ALL Instructors, IIT's and AR owners download it.
Nickle,
I was wondering what you think about the "Improved Battlesight Zero", which, seems to be spot on out to 250-275 (+/- 2 inches).
This is the one where you sight in at 50 yards (crossing the line of sight again at 200 yds).
Zeroing methods: http://groups.msn.com/TheMarylandAR15ShootersSite/zeroingmethods.msnw
Improved Battlesight Zero: http://groups.msn.com/TheMarylandAR15ShootersSite/improvedbattlesightzero.msnw
It seems like this is one of the better ways of zeroing but maybe there are good reasons for not doing it this way.
I'm also curious about what the guys in the field are doing. Are they strictly following the field manual or there folks using this method (or other methods)?
Tony
Quote from: Santander on October 01, 2007, 06:33:21 PM
Nickle,
I was wondering what you think about the "Improved Battlesight Zero", which, seems to be spot on out to 250-275 (+/- 2 inches).
This is the one where you sight in at 50 yards (crossing the line of sight again at 200 yds).
Zeroing methods: http://groups.msn.com/TheMarylandAR15ShootersSite/zeroingmethods.msnw
Improved Battlesight Zero: http://groups.msn.com/TheMarylandAR15ShootersSite/improvedbattlesightzero.msnw
It seems like this is one of the better ways of zeroing but maybe there are good reasons for not doing it this way.
I'm also curious about what the guys in the field are doing. Are they strictly following the field manual or there folks using this method (or other methods)?
Tony
That method does NOT apply to an "as issue", 20 inch barrelled A2/A4 series AR, as you zero dead on at 25 meters, putting your rear sight 1 click off, and are dead on at 300 meters.
Remember, the method I've desribed has been used successfully by a few million of our troops. And, the method on the target is what the troops are using.
Nickle,
Been trying that download for a couple of hours, get the address in the bar, get a Done in the lower left corner, but it is a blank page and it NEVER triggers Acrobat Reader to come up for the .pdf file and nothing but the blank page ever shows.
Thanks,
Buckshot
Well, Buckshot, do you have an e-mail account that can take a 44 MB file?
I can send it to you.
Nickle,
Evidently, for some reason MicroSoft doesn't trust the DOD, as they did not want to accept the certificate of authenticity that the DOD issued to that site.
I manually installed the certificate and I think it is going OK.
Email inbound by PM in any case.
Buckshot
Can't e-mail it, your side won't take it, due to size.
As to the certificate, yeah, DoD Certificates aren't accepted by Microsoft. Just proceed anyways, without the certificate.
I also was unable to get Internet Explorer to link to the site, but I was able to "Right-Click > Save" on that link and download the PDF to my drive. 45.5MB download without having to mess around with the site certificate.
Techsights use A1 sights. This target will work better:
http://www.ohmr.ohio.gov/docs/forms/ohmr2444.doc
Link to M16A2 target in pdf:
http://www.ohmr.ohio.gov/docs/forms/ohmr2444-a.doc
Link to M4 sighting target:
http://www.ohmr.ohio.gov/docs/forms/ohmr2444-b.pdf
Try using this cheat-sheet as well.
With all the variations on the AR15 sights, the moral of the story, WRITE IT DOWN.
When dealing with students, and not having the benefit of knowing exactly what they are working with, start with some assumptions, make the corrections, WRITE THEM DOWN, then confirm them at the target.
There aren't as many variations as most folks think.
2 barrel lengths.
2 different front sights
2 different rear sights (plus the "target" sight, which is very rare).
Most AR's are NOT using A1 type sights, but are using A2 type sights.
The 16" barrel AR uses the same sight radius as the 14.5" M4 Carbine, unless it's a Dissapator, then it's the same as the 20" M16A2 Rifle.
So, there's really only 3 variations, in practicality, though parts do get mixed up ( and that's the exception.
I'll class them as the Military variant they are identical to.
M4 type (14.5" barrel, A2 type sights)
M16A1 (20" barrel, A1 type sights)
M16A2 (20" barrel, A2 type sights)
The Tech sights on the 10/22 are nothing more than an A1 type sight, though they may have a different sight radius. Default to the M16A1 adjustments, and you'll be close enough.
Funfaler's recommendation on WRITING IT DOWN is wise advice for ANY rifle, even an M1 or M14/M1A.
There is at least one more variation for AR sights.
A1 rear with A2 front---- some companies put these out.
I have this combo on a Bushmaster Shorty AK.
Grin Reaper sent me the following about sighting in an AR-15:
Whichever type of sights you choose, read the info at the Maryland AR15 Shooter site on zeroing -- http://groups.msn.com/TheMarylandAR15ShootersSite/zeroingmethods.msnw. I and many others like the Improved Battlesight Zero, which has you zero at 50 yards (and requires some adjustments to the rear sight, if you are using one of the 1st two types of sight options discussed above) -- http://groups.msn.com/TheMarylandAR15ShootersSite/improvedbattlesightzero.msnw. Why do this? Quote When zeroed at 200 meters, a distance twice that of normal combat engagements, these rifles have a very flat trajectory that is less then 2" from line of sight at all intermediate distances; a distance that's smaller than the normal dispersion of arsenal or factory loaded ammunition. This tiny trajectory arc allows very precise shooting out to 250 meters where the bullet is only 2" below line of sight.
Quote from: ken grant on December 12, 2007, 10:32:18 AM
There is at least one more variation for AR sights.
A1 rear with A2 front---- some companies put these out.
I have this combo on a Bushmaster Shorty AK.
Then you simply adjust the elevation like an A2, and windage like an A1. In this case, being a shorty, it's a little different. The elevation adjusts like an M4, and you'll have to adjust the windage like an A1, knowing it's going to be slightly off.
The Maryland Shooters info is way too complicated for my taste.
Done right, a 20" AR A2 type is zeroed for 300 meters, done at 25 meters, just like it says on the appropriate target. 200 meters and under, you use the 200 meter arpeture (the large one) for your shooting, above that, the regular (small) arpeture.
Simballo,
I zero'ed my AR (20") with the "Improved BSZ" and frankly, I like it. You've got the best of both worlds because you can still set it to the "Normal" BSZ by dialing up. And, of course, if you're going to High Power match events then you can simply dial it in.
T.
There is another way to adjust your sights for a different IBSZ that will let you be on target at 100 M/Y's.
It is labeled the R-IBSZ. It is almost the same as the IBSZ except you start at a lower rear sight setting on elevation. It gives you a setting for a 100 Y/M zero + a 200 setting and the fact you can dial to a range setting on the elevation scale and have all the range markings correct for each of the other ranges
Seems as if it would work great for people who only have access to a 100 Y/M range.