SIG SAUER SIG 551-A1 Rifle - Manual (Page 25)

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2.1.9 Sights
The SIG551-A1 rifle features integrated accessory mounting rails on the upper receiver
and hand guards. These rails may be used for attaching a variety of sighting systems, both
optical and fixed. The accessory rails are compatible with all Picatinny standard mounting
systems. Some models feature “emergency” flip up blade sights as a standard option.
These sights are designed to provide a backup aiming solution in the event your optics
should fail but are certainly capable of be used as the sole sighting system for the rifle.
Windage (left / right) adjustment:
Windage adjustments are made by rotating the front sight screw left or right. The adjustment screw head is located on
the left side of the front sight assembly. Adjustments are made using a 4mm allen key, available at any hardware store.
- Rotate front sight screw right (clockwise) to move impact right.
- Rotate front sight screw left (counter-clockwise) to move impact left.
One full rotation of the front sight screw will move the impact of the rounds
approximately 1” at 100 yards.
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