M203
Sight Adjust.
The LEAF SIGHT is used in conjunction with front
sight post of the M16A1 rifle and provides range selection from
50 to 250 meters in 50 meter increments. Turning windage screw
clockwise moves sight leaf to left for left wind. Counterclockwise
adjusts for right hand wind. One increment equals 1.5 meters at
200 meters range.
The elevation adjustment screw compensates for distance corrections.
Raising leaf sight increases range anc lowering leaf sight decreases
range. One increment equals 10 meters at 200 meters range. The
rim of a used 40mm cartridge can be used to turn the screw.
The QUADRANT SIGHT attaches to the rifle handle/sight and has range from 50 to 400 meters in 25 meter increments. Elevation adjustment: 1 notch - 5 meters at 200 meters. The rear aperture slides in or out for windage correction by depressing retainer. Vertical line denotes center. 1 notch equals 1.5 meters at 200 meter range. Turn front sight post right for less elevation and left for more elevation. Slide the rear aperture in (towards carrying handle)to move strike of projectile right; Slide out (away from carrying handle) to move strike left.
