Disassembly Of The Trigger Housing Group Under Supervision Only

To disassemble the trigger housing group — a. Squeeze the trigger and ease the hammer forward slowly to the fired position. Grasp the

Figure 19. Removing the hammer spring and hammer spring plunger.

Figure 16. Replacing the trigger housing group.

Figure 18. Assembling the stock group and the barrel and receiver group.

Figure 17. Replacing the selector spring.

Figure 19. Removing the hammer spring and hammer spring plunger.

Carbine Auto Selector

Figure 22. Removing the trigger.

Figure 20. Removing the hammer pin.

trigger housing group in the left hand as shown in Figure 19. With the right hand, insert the operating slide spring guide, or a similiar tool, into the hole in the hammer spring plunger from right to left and pull back until the hammer spring plunger is clear of the notch in the hammer (Fig. 19). Swing the hammer spring and plunger to the right to clear the hammer. Ease forward against the force of the spring until the hammer spring plunger clears the trigger housing group. Remove and separate the hammer spring and the hammer spring plunger. If the operating slide spring guide is used, be careful not to bend it.

b. With the operating slide spring guide, drift out the hammer pin ( Fig. 20). Remove the hammer and disconnector.

c. Hold the trigger housing group in the left hand as shown in Figure 21, with the thumb pressing down on the sear. Using the small end of the operating slide spring guide, drift out the trigger pin from right to left. Turn the trigger housing group upside down and allow the sear and sear spring to fall out.

d. Hold the trigger housing group as shown in Figure 22. Move the trigger forward and then rotate the rear of the trigger upward and forward out of the top of the trigger housing group. Remove the trigger spring from the trigger housing group during this step.

Figure 22. Removing the trigger.

e. Hold the trigger housing group in the left hand as shown in Figure 23-A. With the right hand, insert the operating slide spring guide, or a similar tool into the hole in the lower face of the trigger housing — just forward of the bow. Engage the operating slide spring guide forward of the shoulder of the magazine catch retainer plunger and pull the plunger backwards. Place the left thumb against the magazine catch to prevent the magazine catch and the magazine catch plunger assembly (Fig. 23-A), from flying out. Remove the magazine catch and then the magazine catch plunger assembly from the trigger housing (Fig. 23-B).

f. Remove the magazine catch retainer plunger assembly with the safety plunger attached (Fig. 24-A). Remove the safety from its aperture (Fig. 24-B). The magazine catch retainer plunger and safety plunger are identical and are positioned on opposite ends of the magazine catch retainer plunger spring. The spring actuates both plungers.

Figure 21. Removing the trigger pin g. In Figure 25, you see the parts of the trigger housing group laid out correctly in the order of disassembly.

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Figure 23-A. Removing the magazine catch.

Figure 23B. Removing the magazine catch plunger assembly.

ASSEMBLY OF THE TRIGGER HOUSING GROUP (UNDER SUPERVISION ONLY)

To assemble the trigger housing group —

a. Hold the trigger housing as shown in Figure 19. Insert the safety into its aperture in the trigger housing with the trigger notch pointing to the rear.

b. If you separated the magazine catch retainer plunger, safety plunger, and magazine catch retainer plunger spring, assemble these parts now. Remember, the two plungers are identical. Insert this assembly into its aperture in the magazine catch guide groove.

c. If you separated the magazine catch spring and plunger, assemble these parts now, and then place the assembly in its well in the trigger guard housing. The loose end of the magazine catch spring is inserted first, with the plunger facing outward. Replace the magazine catch into its guide groove in the forward face of the trigger housing with the fingerpiece facing to the rear. Move the magazine catch to the left against its plunger. Grasp the trigger housing as shown in Figure 26. Pull the magazine catch retainer plunger back into the aperture in the trigger housing and at the same time, push the magazine catch completely to the left. The magazine catch retainer plunger will click into position in its recess in the magazine catch, holding the magazine catch in its guide groove. Operate the safety and magazine catch a few times to test the assembly.

Figure 24-A. Removing the magazine catch retainer plunger assembly.

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Figure 24-A. Removing the magazine catch retainer plunger assembly.

d. Hold the rear of the trigger housing group in your left hand. Grasp the long forward end of the trigger with the right thumb and forefinger. Hold the trigger level and place it down into the trigger housing group with the fingerpiece projecting part way through the floor of the trigger housing. Grasp the fingerpiece with the thumb and forefinger of the left hand which is holding the trigger housing group (Fig. 27). Position the trigger spring to the rear of the trigger so that the loop end rests in the slot in the rear top face of the

Figure 24-B. Removing the safety.

trigger. The prongs of the spring point upward and bear upon the upper edge of the trigger spring aperture (Fig. 28). This aperture is the lower of the two apertures in the rear of the trigger housing. With the right forefinger over the trigger and trigger spring to hold them in position, press down and to the rear, allowing the fingerpiece of the trigger to rotate forward and upward. When the coils of the trigger spring are seated in the aperture, pull back on the fingerpiece of the trigger to seat it in the trigger housing group. Do not pull back on the trigger until the coils of the trigger spring are seated, or the trigger spring will fly out. Align the trigger pin holes in the trigger and trigger housing, then insert the trigger pin from the left side just far enough to hold the trigger in position.

e. Insert the sear spring in the forward face of the trigger. Place the sear in position on top of the trigger, with the raised shoulder up and pointing toward the front of the trigger housing. The free end of the sear spring must be seated in the rear face of the sear. Hold the trigger housing group in the left hand as shown in Figure 29, with the forefinger pressing against the trigger pin. Force the sear to the rear by applying pressure against its raised shoulder with the operating slide spring guide. At the same time, maintain pressure against the rear of the sear with a finger of the right hand and align the trigger pin holes. Seat the trigger pin.

f. Replace the disconnector, making sure that its rear end is on top of the sear (Fig. 30). Replace the hammer with its long end up and curving to the rear (Fig. 31). Engage the sear notch of the hammer with the sear nose and rotate the hammer t ¡few*«.*:.*)ft. 'M'-•¿i'^fe:-:

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