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Posted: 12/24/2006 3:59:04 AM EDT
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Hi all I'm new to this forum. I just took my brand new Olympic A1 upper Plinker AR-15 to the range. It shoots great. No matter what load I shoot it shoots the same nice tight group....at 25 yards. The problem is that it shoots to the right. I have the rear sight adjustment as far to the left as possible, but it still shoots 4" to the right of the bullseye. Any suggestions? Should I send it back to Olympic Arms? I'm expecting a carry handle scope mount and red dot scope on Tuesday, which I had ordered last week. That should cure my sighting problem, but I sure would like the open sights to be on also. Someone on another forum told me to check the gas block alignment, whatever that is. Any advice? |
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'Sounds like way too much torque on the barrel nut to get the gas tube slot aligned' A very common problem on ARs. As the nut was over-tightened, the front sight base rotated too far left, throwing point of impact to the right, and possibly shearing off or deforming the soft indexing pin and/or damaging the receiver. I had one where the POI was left, meaning the nut had to be tightened more. A properly set-up upper should give a POI on-center (within an inch, which is better than most people can shoot) at 50 yds with the aperture centered. Assemblers sometimes will support the upper in a certain way and hit the FSB with a big mallet to whack it into line by rotating the barrel in the desired direction. |
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