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The AR-15 rifle comes standard with aperture iron sights. The front iron sight is of the barleycorn style while the rear sight is one of two peepholes. The larger peephole is used for closer engagements and/or automatic fire while the smaller one is used for long range, accurate shots. The front sight can be adjusted for elevation by rotating the sight with the tip of a 5.56 round or a special tool. On the A1 style rear sight, turning the dial on the side adjusts windage by moving the peephole from side to side. The A2 has the same function for windage, and also adds a horizontally oriented dial for adjusting elevation. To aim, position the weapon so that the front sight covers the target and is centered in the peephole.

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12y ago

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