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How to set the sights on the M60 Machine Gun for elevation and windage

Guidance from FM 3-22.68 on properly adjusting the M60 sights for elevation and windage

The range scale on the rear sight is marked for each 100 meters from 300 to 1,100 meters. It can be adjusted for zeroing. Range changes are made by using either the scale retaining/adjusting screw or elevation knob. The scale retaining/adjusting screw is used to make major adjustments in elevation. The elevation knob is used to make minor adjustments, such as during zeroing. Four clicks on the elevation knob are equal to a 1-cm change in elevation or point of aim 1 cm. From the rear of the weapon, the elevation knob is turned clockwise to raise the rear sight and lower the strike of the round. It is turned counterclockwise to lower the sight and raise the strike of the round. The rear sight is adjustable for windage, 5 mils right or left of the zero index line. The windage knob is on the left side of the rear sight. One click on the windage knob equals a 1-cm change in deflection or point of aim 1 cm. The windage knob is turned toward the muzzle of the weapon to move the sight and the strike of the round to the right. It is turned toward the rear to move the sight and the strike of the round to the left.

Elevation. Before making elevation adjustments, the range knob must be at its highest setting. If the center of the shot group is above or below the aiming point, the gunner rotates the elevation knob by moving the rear sight slide in the direction of the desired change. One 180-degree turn in either direction moves the strike of the round 1/4 cm at 10 meters, or four clicks equals 1-cm change.

Windage. If the center of the group is to the left or right of the black aiming paster, the gunner must correct for windage. To correct windage, he rotates the windage knob to move in the direction of the desired change. For example, he rotates the windage knob toward the muzzle (counterclockwise) to move the strike of the round to the right; he rotates the windage knob toward the buttstock [clockwise] to move the strike of the round to the left. One click in either direction moves the strike of the round 1/2 cm at 10 meters.

10-Meter Zeroing, Set the Sights (Mechanical Zero). The gunner indexes or places the range scale on a range of 500 meters. He aligns the windage by placing zero windage on the index line. He assumes a prone position and sights on the target.

 

 

Sight Settings for the M60 Machine Gun


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