SpecterOS4x Operation Manual
Page 10
CHAPTER 3
DETAILED OPERATION
3.1 General
The following procedures are used to operate the SpecterOS4x Optical Sight.
3.2 Installation
Before installing the sight, be sure the weapon is unloaded.
To install the optical sight proceed as follows:
Assume the normal firing position. Loosen the mount levers until they are perpendicular to the body of the
sight.
Place the sight on top of the rail (but not into a rail notch) and slide the sight along the rail to find the
position where a full field of view is visible through the sight (approximately 2.75 inches of eye relief) by a
minimizing of the tunnel effect of the field of view. Note the position of the sight on the rail.
NOTE: A common mounting position on a M4 Carbine or M16 Rifle receiver is with 3 slots visible in front
of the sight.
Mount the optical sight on the rail at the closest match of mount slot bar and rail slots. Push the sight to
the forward most position within the slot. Tighten the mount levers in towards the sight body until they are
parallel to the sight body.
For extra mounting security, the mount provides slots to accommodate plastic or wire tie wraps so that the
levers can be locked into their closed position.
The sight is now mounted on the weapon.
3.3
Method of Adjustment
The optical sight now has to be zeroed to align the point of aim with the point of impact of the bullet.
Azimuth zeroing adjustments are performed by placing a coin into the windage screw and rotating the
screw clockwise or counter clockwise.
The Elevation Adjust at the back of the mount, under the eyepiece. A lock (silver tab) must be disengaged
(lifted up) to adjust the elevation zero. This lock should always be engaged (pushed down) when not
zeroing.
It is very important that the lock be fully disengaged (all the way up) before the elevation
adjustment dial is turned.
3.4
Dry Zeroing or Initial Alignment
Initial adjustment of the optical axis is required so that it is in rough alignment with the bore axis of the
weapon. This will make zeroing easier to accomplish. There are two simple ways to accomplish a rough
zero that will provide a good starting place for live fire zeroing.
3.4.1
Dry zero the optical sight as follows:
3.4.1.1
WINDAGE: Adjust the azimuth adjust until the gaps between the mount base and the optical
housing forks are equal.
