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View Full Version : This may be a newb question but w/e


Cuerno_de_Chivo
06-15-2012, 9:21 PM
Ok so i guess the way i sighted my AR was wrong (LOL Yea i'll take the flame w/e, i used the rear sight for elevation lol It worked for 100 yards though).

I googled the right way and people said to use an allen wrench to loosen some screw on the rear sight.

What exactly is that for?

I googled it but never got WHY it was important to do so. In the instructions they just said to do it. I just want to know why and what does that do. Sorry again if it's a newb question but i need to know.

clutchy
06-15-2012, 9:31 PM
typically people have windage on the rear and elevation on the front sights.

if you have an LMT type sight or a carry handle sight usually the rear sight can do both windage and elevation.


I'm not sure what they're telling you to do as far as loosening things.


lots of people recommend zeroing to 50 yds so you get zero at 50 and 200 or something like that.

Cuerno_de_Chivo
06-15-2012, 9:36 PM
Well from what i've read the rear is for going further ranges once you're sights are zeroed. I'm zeroing at 50 but i read that some loosen the screw on top of the sight but i don't know why it's done.

clutchy
06-15-2012, 9:39 PM
Well from what i've read the rear is for going further ranges once you're sights are zeroed. I'm zeroing at 50 but i read that some loosen the screw on top of the sight but i don't know why it's done.

what sight is it?

some have elevation adjustments to compensate for distance drop.

the KAC sight is a good example of this.

http://cdn102.iofferphoto.com/img3/item/380/901/672/kac-600m-rear-folding-sight-ex-180-free-ship-43af5.jpg

Cuerno_de_Chivo
06-15-2012, 9:52 PM
I have this one:

http://www.lmtstore.com/accessories/sights/tactical-adjustable-rear-sight.html

But the way i was doing it was using the rear sight to move the shots up or down. Which was wrong since that is only used for when the rifle is zeroed to shoot at larger distances.

russ69
06-15-2012, 10:03 PM
The set screw is just to move the elevation knob so the yardage lines up, not a big deal.

anymoose
06-15-2012, 11:34 PM
Ok so i guess the way i sighted my AR was wrong (LOL Yea i'll take the flame w/e, i used the rear sight for elevation lol It worked for 100 yards though).

I googled the right way and people said to use an allen wrench to loosen some screw on the rear sight.

What exactly is that for?

I googled it but never got WHY it was important to do so. In the instructions they just said to do it. I just want to know why and what does that do. Sorry again if it's a newb question but i need to know.

What length AR are you shooting? IIRC people adjust that set screw so that if they are using a zero other than the 25m zero, the number still correspond, i could be wrong though. The adjusting of the screw has always confused me, im pretty happy with my BUIS now, and i dont have to worry about making adjustments to make my elevation knobs accurate.

With your sight, the way its meant to be sighted in, what you want to do is turn it two clicks to the right, to the "z" (zero) position (this will be just about as tight/ low as you can get it), then you zero at 25m (METERS, not yards, which is pretty hard to do at just about any shooting range) using your front sight, then all of your elevation settings should just about correspond to the distance you are shooting.

Personally, with a carbine, i zero at 50 yards, it provides a relatively flat and accurate path anywhere from 0-250 yards. the 25m zero is nice for longer shots, but the path is kind of crazy if you dont know what distance you are shooting at inside 300.

Heres why i clarified to zero at METERS and not yards-

25yard zero (typical of most shooting ranges ive seen to be at yards)
http://www.box.net/shared/static/cednvi8d7o.jpg

25m zero (this is what your sights correspond to, if you are set up at 25yds, your sights will be off)
http://www.box.net/shared/static/f2aede6t0d.jpg

so lets say you zero at 25 yards, then you set your sights to 3 to take a 300meter shot, if you are zeroed in yards, your shot will be about 9 or 10" high.

What i dont like a bout the 25yard or meter zero is that its just not practical for me, at the range i cant normally shoot past 100 yards, so with a 25m zero, ill be off by 6" or so. this is why people use the set screw adjustment, you can zero at 100 for range use, and your sights will still be right (I THINK, again, im not completely sure thats why they dot it, thats just what i understand.)


to simplify things-
hers why i like a 50yard zero - (the curve looks crazy, but look at the inches on the left, anywhere out to 250 yards, and you are going to be within 2 inches of your point of aim) it does start to drop pretty quickly after 250yards, at 350 you are about 18" low. but for everything i see my rifle being used for, the 50yd is perfect.
http://www.box.net/shared/static/8xved8kfrm.jpg

SocomM4
06-16-2012, 12:27 AM
Its important for your Zero. and making the rear sight correct for yardage.


You bottom out the sight then raise it 2 or 4 clicks,(cant remember)if the dial says 6/3, its fine , if its on another yard setting you can loosen the lockpin, and rotate half of the windage wheel so the so the dial reads correctly.


Imo the best practical Zero is 50 yards. heres why:
http://www.policeone.com/police-products/firearms/accessories/sights-scopes/articles/1298015-Sighting-choices-for-your-patrol-rifle/

Cuerno_de_Chivo
06-16-2012, 6:46 AM
Wow, thanks guys that helped a lot. I just got confused about the set screw but I'm good now. 25 meters is hard to find but the 50 yard trajectory looks much better anyway. Thanks again!