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Posted: 8/11/2011 2:51:39 AM EDT
I have read a couple of articles regarding zeroing the main Iron or Battle sights on the AR15 which involve setting the rear sight to 8/3 and winding the front post up/down while firing a 3 shot group at a 25yd target. This of course relates to the 556/223 variant of AR15.



My question is, would this routine be the same for the .22LR variant of the rifle, or would we use different settings?
Link Posted: 8/11/2011 3:09:36 AM EDT
[#1]
The primary aim is to get the mechanical elevation zero on the rear sight set by adjusting the foresight height, as you Magpul rear BUIS is not adjustable for elevation you will have to adjust the foresight and accept that it will be for one distance only.  Secondary to that is that the Magpul BUIS are just that BUIS, not precision by any stretch of the imagination as they are made of plastic, so don’t be surprised if they are ‘on’ target one day and 'off' another.

If you want to use iron sights get a elevation and windage adjustable rear sight.  I have one of these LMT Rear Sight
Link Posted: 8/11/2011 3:14:45 AM EDT
[#2]
Link Posted: 8/11/2011 3:16:56 AM EDT
[#3]
Thanks gentlemen, Very helpful indeed. I appreciate it.
Link Posted: 8/11/2011 3:20:01 AM EDT
[#4]
Magpul...... Bin  Useless Idiotic Shit.....


Link Posted: 8/11/2011 3:28:18 AM EDT
[#5]
Link Posted: 8/11/2011 3:29:49 AM EDT
[#6]
Link Posted: 8/11/2011 4:11:01 AM EDT
[#7]



Quoted:



Quoted:

Magpul...... Bin  Useless Idiotic Shit.....











He's right you know.

Do you think you'll actually use them?
Initially I thought I might, but now, I'm not so sure





 
Link Posted: 8/11/2011 4:30:21 AM EDT
[#8]
If you red dot sight is parallax free and the mount is the correct height you can co-wittness the BUIS with the red-dot.  Zero the Red-Dot first, then using the BUIS adjust them until the red dot sits squarely on top of the fore sight when looked at through the rear sight.

Simples.
Link Posted: 8/11/2011 4:37:14 AM EDT
[#9]
Hey I use mine all the time! Admittedly I can't hit shit but I have lots of fun doing it :)





I've found they shoot about as well as I do, though admittedly my eyesight has been deteriorating for years and I need glasses for anything for than 50 yards away.



ETA: I've not had my eyesight checked for 20 years so I'm assuming that it's my eyesight deteriorating, not the world getting fuzzier.

Link Posted: 8/11/2011 4:45:24 AM EDT
[#10]
Link Posted: 8/11/2011 4:58:05 AM EDT
[#11]
So does mine so what is the problem, you are not supposed to use both together.
Link Posted: 8/11/2011 5:10:46 AM EDT
[#12]
Link Posted: 8/11/2011 5:14:55 AM EDT
[#13]
As far as the former goes that's why BUIS fold down.
Link Posted: 8/11/2011 5:19:22 AM EDT
[#14]
Link Posted: 8/11/2011 5:22:54 AM EDT
[#15]
Whaterver.
Link Posted: 8/11/2011 6:03:29 AM EDT
[#16]
Personal taste, but I prefer an AR to have the front A post sight, it's one of the iconic parts of the rifle imo.

It doesn't get in the way of the reticule when using an Eotech with a lower third co witness.

Andy.
Link Posted: 8/11/2011 6:03:34 AM EDT
[#17]
Link Posted: 8/11/2011 9:14:32 AM EDT
[#18]
Well in my opinion the numbers on the knob will be nearly meaningless as far as meaning for hundred meter increments if you're working on a .22 rimfire.

What i would do is set the rear sight 3 or 4 clicks up from the bottom and zero the front sight at 50'.  That should leave you plenty of adjustment from 50' to 100 yards or meters with your rear sight.  The 3 or 4 clicks will let you make some adjustment for different ammo that shoots a touch off.  

Again that's my recommendation for a .22 rimfire and not at all what I would do for a 5.56mm carbine or rifle.   For a carbine I zero at 50 yards with an aimpoint and the backup sight for 100 yards.  For rifle (with standard A2 sights) I zero at 200 yards with the rear set at 8/3 minus two clicks.  This will get the sights approximately regulated for 62 FMJ SS109 ammo for the numbers on the dial to match the trajectory.   Any other ammo and you'll be more off and will need to establish zeros (which you should  verify with SS109 ammo anyhow)
Link Posted: 8/11/2011 10:11:04 AM EDT
[#19]
While most of the LaRue mounts are designed 1/3 co-witness, the Comp M4 mount (LT659) in the NV hight configuration will place that scope at absolute co-witness hight.



The LT751 will mount an Aimpoint Micro T-1 in absolute too.
Link Posted: 8/11/2011 1:14:49 PM EDT
[#20]
Link Posted: 8/11/2011 1:27:29 PM EDT
[#21]
Unless you need a QD mount. In a QD scenario.
Link Posted: 8/11/2011 1:33:42 PM EDT
[#22]
Link Posted: 8/11/2011 1:56:13 PM EDT
[#23]
The standard mount is a knob that stands out from the mount. It is not as quick to detach this system as it is with the LaRue option, that has a QD throw lever. In practice the knob requires at least 2-4 revolutions before the mount becomes loose enough to clear the rail. The Larue system instantly releases the mount from the rail.
Aimpoint:

 
 
Link Posted: 8/11/2011 2:06:23 PM EDT
[#24]
Link Posted: 8/11/2011 2:25:57 PM EDT
[#25]
Link Posted: 8/11/2011 2:32:31 PM EDT
[#26]
You've used it in a combat environment then?
Link Posted: 8/11/2011 2:35:58 PM EDT
[#27]
Link Posted: 8/11/2011 2:36:57 PM EDT
[#28]
Link Posted: 8/11/2011 2:39:35 PM EDT
[#29]
Link Posted: 8/11/2011 2:43:33 PM EDT
[#30]





Quoted:





Quoted:


Unless you need a QD mount. In a QD scenario.






What is a QD scenario?


Do they train for that?



I have been in a Quick Doughnut scenario many times...........


 



..it can get pretty messy..........
Link Posted: 8/11/2011 2:48:14 PM EDT
[#31]
I sell more LaRue mounts to Police/ Mil in this country than I do to civvies. The requirement is always a QD solution better than the optics manufacturer. They choose LaRue and for a reason. I have had tactical firearms guys sat roung here drinking tea telling me what they wan't and what they are up against. Not on the street but through this daft framework scheme the gov has going.

I sell LaRue into a number of forces, from mounts to bipod adaptors.

I know the product pretty well.




Link Posted: 8/11/2011 2:48:24 PM EDT
[#32]
Link Posted: 8/11/2011 2:50:45 PM EDT
[#33]
Its a quick discharge situation when the arse is not in sinc with the toilet.


Quoted:





Quoted:


Quoted:

Unless you need a QD mount. In a QD scenario.




What is a QD scenario?

Do they train for that?


I have been in a Quick Doughnut scenario many times...........  



..it can get pretty messy..........






 
Link Posted: 8/11/2011 3:04:54 PM EDT
[#34]
Link Posted: 8/11/2011 3:13:31 PM EDT
[#35]
Quoted:

Quoted:
Quoted:
Unless you need a QD mount. In a QD scenario.


What is a QD scenario?
Do they train for that?

I have been in a Quick Doughnut scenario many times...........  

..it can get pretty messy..........



As a trained MP and civilian police officer....avoid the powdered jelly donuts.  If the powder doesn't get you the big dollop of jelly will.  
Link Posted: 8/11/2011 3:16:43 PM EDT
[#36]



Quoted:



Quoted:




Quoted:


Quoted:

Unless you need a QD mount. In a QD scenario.




What is a QD scenario?

Do they train for that?


I have been in a Quick Doughnut scenario many times...........  



..it can get pretty messy..........






As a trained MP and civilian police officer....avoid the powdered jelly donuts.  If the powder doesn't get you the big dollop of jelly will.  



Too late..........damn those 5 packs.........

 
Link Posted: 8/11/2011 3:32:16 PM EDT
[#37]
Quoted:
Quoted:
I sell more LaRue mounts to Police/ Mil in this country than I do to civvies. The requirement is always a QD solution better than the optics manufacturer. They choose LaRue and for a reason. I have had tactical firearms guys sat roung here drinking tea telling me what they wan't and what they are up against. Not on the street but through this daft framework scheme the gov has going.
I sell LaRue into a number of forces, from mounts to bipod adaptors.
I know the product pretty well.



I think you'll find that there a lot of us that have been selling/ using Larue products longer than you have even been on the scene.
You should also realise there are a lot of people on this board that have been actively shooting these AR thingies for a decade or more, and have never been shy at throwing money at the latest and greatest products. They also know what works and doesn't, what is necessary and what isn't.

If the QD mount is so great, how come the DoD and MoD etc haven't issued large multi million $$$/£££ orders for them?
Doctrine, especially with the UK authorities is to leave the items alone.
Why do you think sniper rifles such as the No4T/L42 had matching numbers for the rifle and scope, and why early M16's in the British Army had the front takedown pin removed and placed with a nut and bolt?

Why does the M24 and M40A5 have heavy duty rings with 1/2" nuts as attachments?
Why does the ACOG come with 2 thumb screws?
Why does the Aimpoint M68 CCO have a STD attachment?
Why do all military attachments have normal mounting systems?

ARMS were around long before Larue and they were never adopted. Larue haven't been adopted, and neither probably will. There is no need.

All these things are aimed at the civilian Market that likes to spend money.
Most of us have LT 104 mounts. Do you know why?
It's not because they have a QD attachment, it's because they have better eye relief.
If they didnt have the QD facility it wouldn't bother anyone
Mark. Why is the Sky Blue? Who gives a shit.
You have absolutly no idea what is going on with LaRue in the UK.  I'm fucking sick and tired of this 'You are not worthy' attitude to these products.
LT-104, Eye Relief? Yes that was my big seller to West Yorkshire Police for that product. What are you trying to do, reveal some amazing hidden mistery that is LaRue optics mounts, something that we all missed.
What you missed (because you don't sell to the forces) is that QD features ARE important to the Police. End of Story.



Link Posted: 8/11/2011 3:47:45 PM EDT
[#38]
Link Posted: 8/11/2011 9:59:05 PM EDT
[#39]
We don't have any LaRue kit at work.
Link Posted: 8/11/2011 10:24:10 PM EDT
[#40]
Link Posted: 8/11/2011 10:38:52 PM EDT
[#41]
Thing is if it's QD it will get fiddled with if its bolted on it most probably wont.

I can just imagine a EOTECH QD mount on the Mk44 Mini-gun used widely in the Force Protection roll by the skimmers, a little bit of a fiddle and splash the primary sighting system is over the side in the briney.

The Plod (MoD, Civil Nuc, Garada and Met) that I have shot with on H&K Demonstration days have generally been clueless about whats out there as in sights, mounts, rests etc and couldn't even zero a S&B 3-12x50 properly at 100m (these were allegedly the experts (MoD) who trained everyone else).  They train for a very specific role and shoot most people at very close range so the training is probably focussed more on that than marksmanship. I don't know what a QD senario is (unless related to unplanned bowel movements) but if I was offered some LaRue kit and the department was paying, clueless or not, I could probably be convinced to take it even if I didn't really need it.
Link Posted: 8/11/2011 11:09:01 PM EDT
[#42]
I woud be wary of giving the Police anything that is easily removed. They are inveterate fiddlers, particularly when bored. If it can be taken apart, or easily broken................






That said, I have been toying with the idea of a second LT-104 and two scopes. One a 1-4x compact for Service Class, the other with longer legs for distance, precision stuff. As I am going to limit myself to one centrefire rifle, it seems a good idea to have the two sighting options, easily switched...........




...anyway, I think we've lost sight of what the OP is about............

 
Link Posted: 8/11/2011 11:23:51 PM EDT
[#43]
Link Posted: 8/11/2011 11:44:42 PM EDT
[#44]



Quoted:



Quoted:

I woud be wary of giving the Police anything that is easily removed. They are inveterate fiddlers, particularly when bored. If it can be taken apart, or easily broken................



That said, I have been toying with the idea of a second LT-104 and two scopes. One a 1-4x compact for Service Class, the other with longer legs for distance, precision stuff. As I am going to limit myself to one centrefire rifle, it seems a good idea to have the two sighting options, easily switched...........




...anyway, I think we've lost sight of what the OP is about............
 




You're not kidding, but that's already been answered so now

We're having an Internet disagreement.

That's what we always do


Oh, ok then. Blue is nicer than red.............

 
Link Posted: 8/12/2011 1:37:42 AM EDT
[#45]
Link Posted: 8/12/2011 2:13:10 AM EDT
[#46]


There....everyone can be happy...
Link Posted: 8/12/2011 2:13:39 AM EDT
[#47]
Link Posted: 8/12/2011 4:23:46 AM EDT
[#48]
Link Posted: 8/12/2011 4:29:15 AM EDT
[#49]
Link Posted: 8/12/2011 4:31:04 AM EDT
[#50]
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