Obtaining an accurate initial burst of fire is essential. If you can hit the enemy frost, he is not going to be able to return your fire effectively. To do this, you must be able to estimate the range to the target correctly; you must correctly set your sights, and you must be able to lay the gun properly by manipulating the traversing and elevating mechanism (T& E). After the estimated range has been set on the rear sight, the gun is adjusted until the line of sight intersects the target at its center base.

Position and Grip

Except for the assault positions, the machine gunner should fire the M60 machine gun from the prone position, using either the biped or the tripod. In

Figure 13-28.-Prone position with biped-mounted machine gun.

Figure 13-29.-Imaginary line.

permanent defensive positions, machine gun emplacements may be dug deep enough so the gunner may stand while firing.

BIPOD-MOUNTED GUN.- When firing the M60 from the biped (fig. 13-28), you must assume a prone position at the rear of the gun. Your right shoulder should be placed firmly against the butt stock group and under the raised shoulder rest. An imaginary straight line, extending through the barrel and receiver, should pass through your right shoulder and hip (fig. 13-29). Your legs should be spread comfortably apart, with your heels down (when possible). Grasp the handgrip with your right hand and place your index finger on the trigger. Place your left hand palm-down over the rear of the feed cover and apply downward pressure. Rest your cheek against your hand and the feed cover. While aiming and firing, exert firm pressure to the rear with both hands.

TRIPOD-MOUNTED GUN.- The firing position when firing from the tripod mount (fig. 13-30) is similar to the position used when firing from the biped. The difference is that the hinged shoulder rest is not used,

Figure 13-30.-Prone position with tripod-mounted machine gun.

Figure 13-31.-Sight alignment.

Figure 13-32.-Correct sight alignment and correct sight pictures.

and your elbows should be inside the tripod legs, but not touching the tripod. Your left hand should grasp the elevating handwheel, palm down to accomplish all manipulation. When firing and aiming, exert firm pressure to the rear with both hands as you would when firing from the biped.