Be careful not to damage the internal ribs when installing the forearm assembly

a. Replacing Receiver Assembly and Forearm Assembly. To replace the forearm assembly, the gunner slides it onto the receiver. He presses in on the bottom of forearm assembly to latch. He shakes the forearm assembly up and down to ensure it is seated.

b. Replacing the Trigger Mechanism Grip Assembly. To replace the trigger mechanism grip assembly, the gunner positions it on the bottom of the receiver, aligns it with the T-slot, and installs the front pin from the left side. He slides the slotted end of the flat leaf spring on the front pin. (The hooked end of the flat leaf spring should bend outward.) He pushes down and slides the hooked end of the flat leaf spring onto the grooved pin (Figure 2-15).

T-SLOT FRONT PIN

Figure 2-15. Replacing the trigger mechanism grip assembly.

T-SLOT FRONT PIN

Figure 2-15. Replacing the trigger mechanism grip assembly.

c. Replacing the Barrel Assembly. To replace the barrel assembly, the gunner ensures that the barrel lock is up (unlocked) before inserting the barrel in the forearm assembly. He pushes the barrel lock down to lock it. Then, he lifts it up by the bipod and shakes it to ensure it is seated.

d. Replacing the Cover, Hanger and Cartridge Feed Tray Assembly. The gunner positions the hanger and cartridge feed tray assembly on the receiver. He installs the torsion spring and cover assembly and makes sure the ends of the torsion spring stick in the holes of the cover and receiver. (The hinge pin is inserted from right to left.) The gunner applies slight pressure to line up the torsion spring and inserts the cover hinge pin. He installs the hinge pin latch through the hinge pin until it locks. He keeps the cover assembly open until the machine gun is assembled.

e. Replacing the Bolt Assembly, Operating Rod Assembly, and Buffer Assembly. The gunner places the yoke of the operating rod assembly against the spool of the firing pin in the slot of the bolt assembly (Figure 2-16). Then, he pushes the spool forward. He seats the yoke between the spools of the firing pin and lets the yoke slide back in the bolt assembly.

(1) Slides the operating rod assembly with the bolt assembly into the weapon. Turns the bolt assembly so that the stripping lugs line up with the upper rails. Pushes in until the stripping lugs engage the rails.

(2) Turns the roller straight up and pushes the bolt assembly and operating rod assembly as a unit into the weapon.

(3) Pulls and holds the trigger while pushing the bolt assembly into the receiver until it locks in place.

(4) Installs the drive spring and guide assembly in the rear of the receiver.

(5) Inserts the buffer assembly against the end of the guide assembly and pushes until the groove on the buffer assembly lines up with the slot for buffer retaining yoke. Inserts the buffer retaining yoke.

f. Replacing the Stock. The gunner positions the stock on the rear of the receiver and pushes until it snaps in place. He pulls the cocking handle to the rear to lock the bolt assembly to the rear, and then he places the safety on "S." He closes the cover. While holding the charging handle, he pulls the trigger and eases the charging handle forward.

Figure 2-16. Replacing the bolt assembly, operating rod assembly, and buffer assembly.

Figure 2-16. Replacing the bolt assembly, operating rod assembly, and buffer assembly.

2-10. FUNCTION CHECK

The gunner must perform a function check to ensure that the M60 is correctly assembled. The procedures, in order, are:

• Open the cover and pull the cocking handle to the rear.

• Place the safety on "S" position.

• Return the cocking handle to the forward position.

• Close the feed tray cover.

• Place the safety on "F" position.

• Grasp the cocking handle with the right hand, pull the trigger with the left hand, and ease the bolt forward.

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Knife Throwing Techniques of the Ninja

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