View Full Version : zeroing help

June 08, 2009, 20:07
i am new to the fal family and just purchased my first dsa stg58c18 and having problems zeroing the sights. had it out to the range the other day and had the front sight post turned all the way in and i am still shooting 6-8" low at 25 yards. any help?

June 09, 2009, 09:23
Do you have an inch rear sight and a metric front sight by any chance? That will do it as the inch rear is much higher.

June 09, 2009, 18:04
being a newb i don't really know. it is a factory gun from dsa. is ther a way to tell the difference?

June 09, 2009, 18:15
Inch rear sights are taller than metric & the blade folds down. Metric don't fold.

There are several different height front sight blades available, the height is determined by the number of "dots" on the round base of the post.
When I say dots I mean a pattern of from 1 thru 4 (actually 0 thru 4) across the diameter of the base, not around the circumference.
The less dots the shorter the sight, so maybe you need to get a shorter one. How many dots do you have right now?

June 09, 2009, 18:48
here are a few pics to help

<a href="http://s254.photobucket.com/albums/hh112/dairdvl/?action=view&current=DSC00498.jpg" target="_blank"><img src="http://i254.photobucket.com/albums/hh112/dairdvl/DSC00498.jpg" border="0" alt="fal"></a>
<a href="http://s254.photobucket.com/albums/hh112/dairdvl/?action=view&current=DSC00499.jpg" target="_blank"><img src="http://i254.photobucket.com/albums/hh112/dairdvl/DSC00499.jpg" border="0" alt="fal"></a>

thanks again for all the help

Mosin Guy
June 09, 2009, 19:38
Your front sight post is a #2 dot and it sounds like you need a #1 dot which is shorter than your present front sight post

June 09, 2009, 20:26
How long is the barrel?

June 09, 2009, 21:07
the barrel is 16.25"
they also say in the manual that you can grind the front sight post if needed. i guess you guys would not recomend that.
thanks again for all the help

June 09, 2009, 21:13
16" FAL's always shoot low.
Standard-configuration FAL sights are NOT calibrated for any length barrel except STANDARD LENGTH.

Don't waste your time grinding on the front sight.

If you are 6" low at 25 yards, you need a 24 MOA correction.

To achieve a 24 MOA correction, you need to grind 0.006" per MOA.
I promise you, you do NOT want to grind 0.144" off the front sight.

Just jack the rear sight up to the 500 or 600 mark and call it good.

As others have suggested, you may have some success using a taller rear sight, such as an Israeli or inch pattern. But no matter how you slice it, the sights will never be regulated to match the yardage numbers marked on the rear sight.

June 09, 2009, 21:17
thanks alot for the info. i'll try that this weekend. but don't you think dsa would know this when they build this rifle and make some mods. do you think i should go to the shorter sight post?

dave s

June 09, 2009, 21:20
They have know this for years, and they have known we know this, and nothing changes.

How much shorter do you think you can make that sight post, and still have it tall enough to be seen?

June 09, 2009, 21:23
Somebody around here had the specs on what are the height differences of the metric, and inch, and Izzy rear sights.

I can never find that thread/post whenever I look for it.

Maybe somebody else here has it bookmarked.

June 09, 2009, 21:25
The only way you are going to get those sights even close to being correctly regulated is to lower the front sight 0.144"... or raise the rear sight 0.144"... or split the difference somehow.

Most folks either don't care, because they buy these guns just to have them, and not actually shoot them, or they just put an optic on the gun, and never think again about the iron-sight issue.

June 09, 2009, 21:29
you make some really good valid points. thanks again for all the info. it's great for tha fal clan to have guys like you on this site to share their knowlege with people just getting in like me.

dave s

June 10, 2009, 06:10
If you can find one you could replace that rear sight with one for an indian FAL.
It's a cross between the metric, fixed, & the inch folder, but with a height that is in between the two.
IIRC it comes out to a -2 dot change in the front sight.

Member MOUNTAINMAN is selling higher than normal rear sight parts too, maybe contact him & see what he has.
Here's the thread about it.

June 10, 2009, 07:27
You said you were shooting at 25 yards. That is awfully close. Bullets arch. Have you tried zeroing at 100 yards? It would not suprise me in the least that you are hitting low at 25 yards. It is my experience that M16s do the same thing.

Imagine a laser beam going from your eye to infinity. Now the bullet is lower than your eye, and it archs up and then back down. If you are close, I do not believe it is abnormal to experience a drop.

My advice would be to zero her in at 100 yards before you do any grinding. If you can get her dead on from there, see where you are hitting at 25 yards. Take this into account if you ever find yourself in a CQB situation.

June 10, 2009, 07:41
A 25 yard zero is a good battle sight zero - if it is not dead on at 25 no point in going to 100 yards.

June 10, 2009, 12:24
sight height being the distance from the tip of the front sight to the centerline of the bore

http://i227.photobucket.com/albums/dd7/rkba2da/trajectory%20charts/308-15sightheight.jpg http://i227.photobucket.com/albums/dd7/rkba2da/trajectory%20charts/308-22sightheight1.jpg

June 10, 2009, 12:28
If you want to play around with the numbers, the free site at http://www.biggameinfo.com/BalCalc.aspx is very good for working out comparisons.

June 10, 2009, 13:15
I was surprised how much elevation I needed on my AR15 at 25 yards at a recent Appleseed shoot. I always though this zero at 25, good for 300 was a piece of balony, but I used my exact 300 yard dope to be spot on at 25.

Go shoot the rifle at 100 yards, or even better, 200 yards before you start tinkering with it.

June 10, 2009, 18:15
thanks again fellas.
the reason i started asking these questions is because i was'nt even hitting the paper at 25 yards and i am no expert by all means but i have never had a rifle not make the paper at 25 yards. and at the price of ammo now i at least want to get it on the paper before i start throwing rounds at 100 yards. but i will give it a try.

Bwana John
June 11, 2009, 11:09
A DSA windage ajustable Para sight with mountainman's tall A2 flip aperture will fix most low shooting carbines.

This low shooting metric carbine problem was exactly what they were designed for.

If the tall dont fix it the X-tall will for sure!

June 16, 2009, 19:10
Just to give you another view,

I have two FAL's with 16" barrels. I ground down the front sight post (and thinned them too) with good results and the sight picture is still acceptable.