Engage the holding notch of the M60 trigger housing in its recess in the bottom of the receiver (fig. 13-23). Rotate the front of the trigger housing up and align the holes of the trigger housing with the mounting bracket on the receiver. Insert the trigger housing pin from the left.

Engage the rear leaf spring with the sear pin (fig. 13-22). Ensure the leaf spring is positioned so the bent portion is pressed against the side of the trigger housing. Rotate the front of the spring up and engage it with the trigger housing pin.

Replacing the Operating Group

Insert the end of the M60 operating rod into the receiver. Hold the rod with one hand. With your other hand, push forward on the rear of the bolt, causing the bolt to rotate until the locking lugs are in a vertical position, as shown in figure 13-25.

With the cam roller up, push the operating rod and the bolt into the receiver until the end of the operating rod is even with the rear of the receiver, as shown in figure 13-26.

Insert the drive spring guide into the drive spring; then insert the opposite end of the drive spring into the recess of the operating rod (fig. 13-26). Pull the trigger

Figure 13-26.-Inserting the drive spring.

and push in the drive spring until the head of the guide is approximately an inch from the receiver (fig. 13-19).

Replacing the Buffer Group

Insert the buffer plunger into the drive spring guide (fig. 13-19). Push forward on the buffer until the operating rod and bolt go forward fully.

Push in on the buffer until the recesses on the buffer are aligned with the recesses in the receiver. Replace the buffer yoke from the top of the receiver (fig. 13-18).

Replacing the Stock Group

Align the guide rails of the M60 stock with the guide rails on the receiver. Push forward until the stock is frilly seated. A distinct click will be heard when the latch engages.

Check for Correct Assembly

To check for correct assembly, pull the cocking handle to the rear and return it to its forward position. Close the cover and pull the trigger. The bolt should go forward.