M1 Garand Operation, Safety, and Maintenance Guide for Veteran and Civilian Service Organizations, Law Enforcement, and National Cemeteries;
file:///E:/Garands%20M1/M1_Garand_Manual.pdf
FM 23-5 DEPARTMENT OF THE ARMY FIELD MANUAL ;
file:///E:/Garands%20M1/Manual--M1%20Garand%20FM23-5.pdf
(I) To calibrate the rear sight to the battle sight setting you:
· Run the aperture all the way down and loosen the screw in the center of the elevating knob until you can turn the knob forward.
· Turn the elevating knob forward until the 300-yard index line is opposite the index line on the receiver.
· Turn the elevating knob forward from this point to the number of click equal to the 300-yard zero in elevation, less two clicks.
· Hold the elevating knob in position with your left hand and tighten the center screw, then run the aperture all the way up and tighten the screw.
· Check your setting by turning the elevating knob back until the 300-yard index line is opposite the index line on the receiver, then turn it as far forward as you can, counting the clicks. The number of clicks you can turn the elevating knob forward should be equal to your battle sight setting.
To set the battle sight zero on the older type sight (with the locking nut) you:
· Set the 300-yard zero in elevation less two click. Lock the rear sight at this point by tightening the locking nut.
· Loosen the screw in the center of the elevating knob and turn the knob until the battle sight index line is opposite the index line on the receiver.
· Tighten the screw in the center of the elevating knob.
· Check the settings as described in (I) above.
·
.30-'06 M1 Rifle, M2 ball
Range Approximate Adjustment
200 yards 100 yard zero -1 click
300 yards 200 yard +2 to 3 clicks
500 yards 300 yard zero +7 to 8 clicks
