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Posted: 1/24/2003 2:23:57 PM EDT
| My buddy has a olympic A2 kit he put together. The upper come assembled and test fired. The windage had to be turned almost full right to center on target. I told him to smack (with rubber or leather mallet) the front sight after warming it up with a hair drier in the direction he wanted to move the POI. he does not think this is the way to go and will not do it. Am i wrong (again) or is he? |
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You are. Did he follow the directions in the -23&P for installation of a barrel? (put moly-disulfide grease on the threads and torque 3 times?). This is the most likely cause of the problem Now some rifles can be 'fixed' with the application of a rubber mallet - a hair dryer in not needed. But I'd bet a proper re-installtion would be easier on his heart. [;)] |
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When you are assembling the barrel to the upper, you have to tighten the barrel nut pretty tight. If the barrel is unsupported, it will tend to turn slightly with the barrel nut, and won't be in proper alignment. To fix this, unscrew the barrel nut, realign the barrel (you may need to replace the index pin, or use a square of aluminum cut from a soda can as a shim), then retighten the barrel nut while someone is supporting the barrel, so it doesn't turn. -Troy |
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Ihanks for the input. I have not shot or seen the rifle since I helped him assemble it. I was not at the sighting in. The olympic upper comes assembled and test fired at the factory. I would think if the sights were off that much they would fix them, before shipping. The kit I recieved from olyimpic is fine. They say "test fire" not site in, so they may just fire into a water tank without aiming. What do you think he should do with the sights? You are right on which way to move the sight. I was thinking in terms of the rear sight. thanks for setting that straight. |
| If this is a new upper I would contact Oly and have them repair it. Bushmaster had an ongoing problem like this, mine was really bad but they gave me a new upper. A number of Bushy uppers had overtorqued barrels which caused the rear aperature to be far to one side after zeroing the weapon. Some members are not bothered by this, they say that once you zero in, you never have to screw with the windage knob again and since it hit's exactly where you aim they considered it a cosmetic issue. Not me, that's not how I want my sights to be after zeroing, there is something wrong if it needs that much windage. I had at least six M16's that were all issued weapons, some severely abused, but none of them needed more than three clicks to zero, so I use that as a reference but anything under 6 clicks is what I want in my AR15 although that is difficult to come by for some reason Any one who enjoys shooting at 500-600 meters knows that you need to have enough clicks remaining on your windage scale to compensate for a windy day. When your rear aperture is nearly all the way to one side you can't shoot long distance unless it's a perfect day. |
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