Red Dot AR Zeroing In

Racinghart1

Racinghart1

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Hey guys looking for some help on sighting in a Vortex Sparc 2 red dot on my AR15. I've watched all the YouTube videos, and from what I gather all I need to do is align the red dot on the top post of the iron sights. That seemed pretty easy but i could not seem to put the shot where i wanted to. I blamed it on my buddy saying i was aiming dead center and it was his placement of the target that through my shots off.... once I ate my pride I realized i may need a bit more guidance.

I've always shot with iron sights, and this is my first crack at an optic of any kind. I should also point of that the rifle I'm shooting is still very new and maybe i just need more road time with it. Regardless any help with this optic would be greatly appreciated.
Thanks for any help!!
 
Ok, if you’re going for a full co-witness ie. lining up your dot with the front post, you must also line up your rear aperture. Most BUIS have the narrow and broad aperture on the rear sights.
Assuming your iron sights are already sighted in (?), all you need to do to line up the red dot is to look through the narrow aperture of the rear sight like you’re going to just use irons, then adjust your red dot to sit on the front post, while looking through the rear aperture. To confirm, open both eyes to look at your red dot. It should look like it’s still sitting on the front post, with both eyes open.

If you do this right, your red dot will shoot close to point of aim of whatever you sighted your irons to.
 
The rifle is basically new . I'm shooting it from out of the box. and assuming that the factory irons are sighted in. I might, MIGHT have 40 rounds down it. So could i have a bit to do with learning the gun? seems every time i buy a new gun it takes some road time learning how it shoots
 
Handguns usually shoot fine out of the box but not rifles. I’ve always had to check for zero on new and used rifles.

It’s likely your iron sights are off.
You can sight in your rifle by using your irons first, ( turn off your dot for this) then co-witness your red dot or the other way round, by using your red dot to zero, then co-witnessing your irons after. Either way works on an AR.
 
I was wanting to do a full co-witness to start off with and as time went on I would decided to go 1/3 co-witness or take the irons completely off. I do like the idea of being able to use irons if my batt dies on me at the range
 
Racinghart1 said:
I was wanting to do a full co-witness to start off with and as time went on I would decided to go 1/3 co-witness or take the irons completely off. I do like the idea of being able to use irons if my batt dies on me at the range
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If your AR has the fixed front sight post, it’s easier just to do full co-witness. It’s also easier if you should change red dots down the road. Just line them up and they’re good to go. Most people never use their BUIS but it’s tacticool and comforting to have them. Your call.
Racinghart1 said:
How would a guy check to see if the irons are off??
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Aim at target, shoot rifle. Doesn’t hit where you aim, irons are off! Oh yeah, give the irons a shake to make sure they’re mounted tightly on the rails. I would sight in at 25yds to start unless you have good binoculars. .223 holes are tiny! Then you can always click up or down to go 50, 100, etc. Make sure if you are co-witnessing, to adjust the red dot to the irons after you get the irons bang on.
 
yeah just target shooting. I buy the Remington freedom buckets at this point and seems to work pretty well for me.
one other quick question on the irons. if they are off how do you set them? or is that something a smith needs to deal with ? Im not much of a builder when it comes to these things so confidence in adjusting sights is low.
 
Racinghart1 said:
yeah just target shooting. I buy the Remington freedom buckets at this point and seems to work pretty well for me.
one other quick question on the irons. if they are off how do you set them? or is that something a smith needs to deal with ? Im not much of a builder when it comes to these things so confidence in adjusting sights is low.
Click to expand...

What type of AR? Do you have flip up rear sights and the fixed front post?

The rear sight adjusts for windage ie. left and right. There should be a knob on the side.
The front sight adjusts for elevation ( up and down) and is a bit more difficult without the sight tool. The front sight is spring loaded with a detent pin. You need to depress the pin while simultaneously rotating the post.
 
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