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View Full Version : Which AR zero method should I use?


LloydXmas250
05-16-2010, 4:12 PM
I'll be putting my first AR together in about a week and so I've been studying all the different ways of sighting in my AR. I'm trying to decide between the Marine Corps method of zeroing at 25 and 300 meters and the Improved Battlesight Zero method. I like the idea of keeping it simple with the Marine Corps method, but the distances with the other method may suit me better. What is the preferred method in the AR world?

evidens83
05-16-2010, 4:21 PM
RIBZ

Fjold
05-16-2010, 4:24 PM
What distance are you going to shoot at?

Why not zero it at the distance that you normally shoot and have the "come ups" marked or memorized for farther shots.

Suvorov
05-16-2010, 4:32 PM
What distance are you going to shoot at?

Why not zero it at the distance that you normally shoot and have the "come ups" marked or memorized for farther shots.

This!

I would look at what you consider your realistic engagement ranges and decide appropriately. For most non-military (and CQB) applications, I would go with a 100 yard or 50/200 yard zero. Both of which will offer you pretty much point of aim point of impact zeros within most conceivable situations where you would use a rifle for self defense.

I myself have settled on a 100 yard zero.

If you decide to go with one of the zeros you mention, remember that you are going to be complicating your point of aim at ranges from 100-200 yards for the ability to shoot point of aim point of impact at 300 yards. This may be useful if you plan on engaging targets at the range, but if not, then you are sacrificing your abilities at more realistic ranges.

For hunting or target shooting, you must know your come ups.

Cobrafreak
05-16-2010, 4:39 PM
Either one will hit a bad guy at 100 yards.

LloydXmas250
05-16-2010, 4:42 PM
If I'm understanding correctly, the IBZ is meant for 50/200 correct? And if I choose that I make the changes using the allen wrench, then go out and shoot zeroing it in using the front sight post correct?

Anyone know of a good guide to get a 100 yd zero?

Thanks for the advice so far.

Suvorov
05-16-2010, 4:55 PM
Anyone know of a good guide to get a 100 yd zero?

Thanks for the advice so far.

Not sure what you are needing an allen wrench for? :confused:

Go to the range and shoot point of aim point of impact at 100 yards. You will then be about 4" low at 200 yards and 15" low at 300 yards with M193 ammo. Out to 100 yards you will pretty much be POA/POI past 50 yards.

http://www.combatshootingandtactics.com/published/thebattlefieldzerofullpictures.pdf

Most people today use the 50/200 yard "improved" zero, the USMC (or Army) battle sight zero is pretty much useless for most civilian/law enforcement/cqb needs. I find the 100 yard works best for my needs.

pennys dad
05-16-2010, 4:57 PM
+1 for RIBZ

LloydXmas250
05-16-2010, 5:25 PM
Not sure what you are needing an allen wrench for? :confused:

The guide I was reading had me loosen a screw in order to re-zero. I'll take a look at the link you gave.

RGERBER
05-16-2010, 5:56 PM
I sighted my 20” barrel in at 1.5 low at 50 yards, it shoots spot on at 100 yards. –

That is perfect for me – kill zone from 0 – 100 yards.

ddcorral2622
05-16-2010, 6:05 PM
I sighted my 20 barrel in at 1.5 low at 50 yards, it shoots spot on at 100 yards.

That is perfect for me kill zone from 0 100 yards.

+1 thats what i did!

Ishoot
05-16-2010, 6:06 PM
RIBZ +1

LloydXmas250
05-16-2010, 6:30 PM
Alright. I read a bit more on IBZ and RIBZ. That just makes it so I can put elevation knob low enough for 100 yds. It will still let me move the knob back to 300 and then it will be zeroed there correct? If that's the case I'll definitely use that method.

Army
05-16-2010, 8:46 PM
If you have a standard rear sight:

Roll it DOWN until you get to 8/3 (6/3 on M4), then roll it ONE click forward (flat on drum should be away form you). Zero at 25 or 30yds/m. Elevation adjustments are ONLY done with the front sight ("UP" arrow moves the bullet strike up). When all hits stay inside 1.5", it is zeroed to 300m.

Do not forget to move the rear drum BACK to 8/3.

LloydXmas250
05-16-2010, 10:29 PM
Well I read countless threads on the different ways and went with the RIBZ and changed it today. I like the idea of having sub 300 marks for the gun. Now I just have to wait and zero it in. Thanks again for the help everyone.

dilligaffrn
05-17-2010, 9:47 AM
50/200 for me