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Posted: 9/16/2002 7:51:55 AM EDT
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Without adjusting the front sight post, how does moving the front sight tower forward on the barrel affect the point of impact, up or down? |
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No true; the front sight is closer to the bore than the center of the rear sight, so moving the FSB forward would cause the gun to shoot lower. The front sight is always lower than the rear sight, so that the bore axis is slightly up, causing the bullet's path to cross the plane of the sights (usually twice; once on the way up and again on the way down from the apex of the trajectory). -Troy |
| Troy is correct. On an m4a1 with m855 ball ammunition, the bullet connects with the line of sight at 25 meters, reaches its crest (appx thirty inches above line of sight I think?) at 110 meters. Connects with line of sight again at 270 meters. This is why you can zero your rifle at 25 meters, and be ready to go at 300 meters. For those of you who are soldiers, this is why you sometimes have to aim a little low at the midrange targets. |
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