U. S. RIFLE, CALIBER .30, M1903 3 * 3. REAR SIGHT.--The rear sight is adjustable for windage, and the drift of the bullet to the right is offset automatically by the construction of the rear sight leaf. The leaf is graduated from 100 to 2,850 yards. The lines extending across one or both branches of the leaf are 100-yard divisions, the longer of the short lines 50-yard and the shorter lines 25-yard divisions. The drift slide, which may be moved 26X(GH FEEP S/I5HT FIGURE 2.-Rear sight. up or down on the leaf, has notches called open sights and a circular hole called the peep sight. With the leaf raised to the vertical position the lines on either side of the peep sight, and the lower notch, enable the drift slide to be set accurately at any desired graduation on the leaf.
DesignationFM 23-10
EditionJan 1940
StatusSuperseded
Pages237
FunctionMarksmanship Weapons
CollectionHistoric
Public domain (U.S. Government work)