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Posted: 12/5/2004 10:31:14 AM EDT
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Does anyone have a schematic view of an A2 rear sight assembly Thanks |
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Found it. www.ar15.com/content/guides/parts/upperreceiver.html Hope this helps. |
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Thanks for the digging on the sched. Ok next question. With the sight bottomed out at the 300 m setting. Is the right to left wiggle with the sight housing common? What has me baffled is that there is a hole in the receiver and a hole on the sight body. is there a guide pin that should be in place to stop this? when bottomed out at 300m ? |
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Side to side play is loaded. There is a spring and ball detent to get it to return to the same position consistantly. The hole, in front of the flip apertures, is to access an allen screw used to adjust the elevation drum. I believe a 1/16th allen wrench fits. The screw is acessed by setting the drum on the 3/6 or 3/8 position, to line it up, then fliping the aperture to expose the hole. You adjust the elevation by inserting the wrench in the aforementioned position, loosening it three turns, leaving the wrench in place. You can then turn the bottom of the drum, changing the elevation, while leaving the marked part in position. Re-tighten when done. This is used to set up your sights for the Improved Battlesight zero, as described on the Maryland AR-15 Shooters website. What I did on mine, is move the lower wheel, so I ended up being able to move the drum 3 clicks below the 8/3 position. Once zeroed, I can then go 3 clicks below 8/3 for 100 meters, 2 cliks below for 200 meters and set on 8/3 for 300 meters, using the small aperture.  Lonny |
No problem, glad I could help. There really shouldn't be any right-to-left movement in the rear sight housing. This would drastically mess with your windage. It sounds as though something is not as tight as it should be somewhere. As xcpd69 pointed out, there is a hole in front of the flip up sight that allows you to reindex the rear sight. It is a 1/16" Allen wrench. Do what he posted and rotate the bottom ring of the elevation knob 3 clicks clockwise to get the rear sight to bottom at 8/3 -3. Again, that shouldn't have anything to do with a loose housing. Make sure that set screw is tight. Maybe explain a little more in-depth of the problem you're having. |
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Let me see how I can put this Right to left was not a good choice of words it like pivots 2 degrees either left or right It does snap back but it's not square to the handle it's off a hair. It still shoots 100% I was shooting clay pigeon targets sitting on a hill 100 yards away and busting them dead aim with the iron sights. I just hate little things like this it gets under my skin and i can't let it go 
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That's good shooting in itself. Okay what, exactly, is moving? The entire rear sight housing or the flip-up sight itself? |
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That's good shooting in itself. Okay what, exactly, is moving? The entire rear sight housing or the flip-up sight itself? Thanks for the comment , That is the result of sniper school the army was so nice to put me thru but to answer your question. The entire sight housing is moving twisty twisty
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Army sniper school? Damn, for a minute I thought you were a good shot. (joke) The "twisty-twisty doesn't sound good. There is a retaining pin that holds in the rear sight assembly. If you pull the bolt carrier group and charging handle out, you can observe it from the bottom of the upper receiver. What is your make, model, etc. of your weapon? Is it only loose in the 8/3 position, or anywhere? |
Huh? No A2 rear sight housing I've ever seen has left to right slop in it. You could never put windage dope on it if it did. |
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Yup army snipe skool I was lucky to hit anything. started out on a XM21 that's a rebuilt m14 then issued a M24 in 1988 yowza that was beast. they would not let me take it home for some reason ? I looked it over pretty good and it just seems to be a feature of the weapon It's a Bushy xm15-e2s with a A2 upper as you know. I am going to hit my local AR joint and look over another A2 and see if it is the same. thanks for all the help |
The housing itself should not move. If it is, have a trusted 'smith look at it to determine why. Somethings not right. |
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TeuffelHunden1775, take your ar put some elevation on it, now grab the whole a2 rear sight assy. you should be able to rotate it about its axis a short distance. Thats the reason for the ball detent in the front of the sight assy. to put pressure on the upper so the sight tracks true each time. its not a wiggle but a rotation about the center of the assy. It wont go in one direction but will go in another. The sight will spring back to normal as soon as you let go of the sight. My Colt and both Bushmaster have this problem. On some its more noticable than others. edit this is what is done to get rid of the wobble on NM sights.  caption:Two Steel Pillars make the rear sight wobble-free, the rear apeture circular, not oval, the adjustments repeatable |
Regardless of the elevation on my rear sight, the housing has no movement. If yours does, you need to get it fixed. The ball detent for elevation has no bearing on side-to-side movement. Again, if it does, you cannot adjust for windage. Rear sight housing movement is not normal. |
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DC, Movement is normal. This may help: Armalite Tech Notes on A2 Sights |
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nope not the ball detent for elevation but the one that is in front of the sight. you can see the drain hole on the left side of the "ears" those ears is where the sight will rotate about the RSB elevation tower. that spring pushes a ball aginst the al upper to keep the sight in a normal postion. I have no problems zeroing the rifle for left to right from 50 to 537 yards. I have yet to shot beyond that. And i can rotate the rear sight base (RSB) in the cut out for it in the upper. Some have it more than others but they all have it unless you have a NM RSB. |
You hit in the ten ring, that's it Thanks for thelp |
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