Firing And Trigger Heghantsh

The firing and trigger mechanism (fig. 32) serves to release the hammer from the semiautomatic sear and, together with the bolt, serves to fire the touikL It permits of firing semiautomatic and full automatic fire.

The firing and trigger aechsnisn is housed ins ide Che receiver and consists of e banner (1), banner and trigger spring (2) , trigger (3), disconnector [*), disconnector spring (S), full automatic sear (6), full automatic sear spring (7), and selector (8) with lever.

The hamner (fig» 33) serves to strike the firing pin; it has a head (1) the flat portions (la and lb) of which serve as the coefc notch (la) and disconnector notch (lb). The head is rounded In the lower portion to obtain snoot li act ion on thn sear and on the disconnector.

lit the lower portion of the hamer is the full automatic seer notch (2>; tubular base (3) on which the hamer and trigger spring is mounted«

In the central portion there is a connection (4) for the spring.

Tbe hammer is fastened in the receiver by neans of a pin which passes through the tubular base.

The hammer and trigger spring (fig. 34) serves to inpart energy to the hammer for the purpose of piercing the princr of the round. In addition« it actuates the trigger*

The hamner and trigger spring is made of 3 * strand cable. It has * spring loop (1) which grasps the banner body; two ends (2) with pent ends (2a) which press against the rear shoulders of the trigger. The hamer and trigger spring is nouflted on the tubular base of the hamer.

The trigger (fig» 35) serves to actuate the parts of the firing and trigger nechanisn, It has e sear (1) which serves es e stop for the hammer, both for semiautomatic and full automatic tire; hole (2) for the pin; bars (3) «hich are acted on by the ends of the spring; recess (3*) for the base of the disconnectori and trigger (4)«

Kalashnikov RifleMechanism Gun
Figure 32. Firing and trigger mechanism.

A. Assembled; B. Sectional view.

1 - hammer (0-2); 2 - hammer and trigger spring (0-3); 3 - trigger (0-8); 4 - disconnector (0-9); 5 - disconnector spring; 6 - full automatic sear; 7 - full automatic spring (0-6); 8 - selector (assy. 1-3); 8a - selector lever.

1 - head; la - cock notch; lb -disconnector notch; 2 - full automatic sear notch; 3 - tubular base; 4 - connection for spring.

Ak47 Trigger Spring
Figure 34. Hammer and trigger spring (0-3).

- bars; 3a - recess for base of disconnector 4 - trigger; 5 - recess for disconnector; 6

- recess for disconnector spring.

Kalashnikov Rifle

Figure 36. Disconnector

Figure 36. Disconnector

5 - recess for spring;

6 - disconnector spring (0-10).

In the trigger there is a recess (5) for the disconnector spring; in the base of the recess there is a recess (6) for the disconnector spring. The ends of the hammer and trigger spring serve as the trigger spring. The trigger is installed in the receiver by means of a pin.

The disconnector (fig. 36) holds the hammer at full cock in semiautomatic fire if the trigger is not released.

It has a cam (1), lug (2), hole (3) for pinr stop (4), the lower surface of which presses against the base of the groove in the trigger and does not permit the sear to rotate to the.front, and recess (5) for disconnector spring (6).

The disconnector is installed on the same pin as the trigger-

The full automatic sear (fig. 37) serves to hold the hammer at full cod in full automatic fire, and prevents firing when the breech is not completely closed in both semiautomatic and full automatic fire.

The full automatic sear is provided with a lever (1) on the upper end of which acts the full automatic sear disconnector (see fig. 28) when the operating rod is moving to the extreme forward position; the full automatic sear (2); hole (3) for pin; hole f2a) for connecting the short end of the full automatic sear spring.

The full automatic sear is installed in the receiver on a pin« The full automatic sear spring (4) is mounted on the full automatic sear pin and attached to the full automatic sear by means of the short end (4a) which is inserted into hole (2a); the long end (4b) functions as a stop of the pins of the hammer, trigger and full automatic seai, and is installed in recesses of th esfe pins*

Under the action of its spring, the full automatic sear has a constant tendency to rotate to the rear and retain the hammer on the full automatic sear by means of its sear«

The pins (fig- 38) of the hammer, trigger and full automatic sear are identical.

On the left ends of the pins there are shoulders (1) by means of which they press against the left wall of the receiver; grooves (2) in which the long (stop) end of the fulJ automatic sear spring ia located; the latter prevents the pins from falling out of their holes in the receiver-

The selector (fig* 39) is used for changing over the firing and trigger mechanism from semiautomatic

Figure 37. Full automatic sear (0-5).

1 - lever for rotating sear forward; la -upper end of sear; 2 - sear; 2a - hole for connecting short end of spring; 3 - hole for pin; 4 - full automatic sear spring (0-6); 4a - short end of spring; 4b - long (stop) end of spring.

Trigger Pin Falls Out Why

Figure 38. Trigger mechanism pins (0-25).

Figure 38. Trigger mechanism pins (0-25).

1 - lever (1-13); 2 - indicator; 3 - recess for passing operating rod; 4 - lever lug; 5 right pin; 6 - left pin; 7 - lever shoulder 8 - grip for rotating indicator; 9 - lug.

Figure 40. Full automatic sear with stamped receiver.

1 - tubular pin (0-5); 2 -full automatic sear spring (0-6); 3 - hole for short end of full automatic sear spring; 4 - long end of full automatic sear spring.

Kalashnikov Rifle

Figure 40. Full automatic sear with stamped receiver.

to full automatic fire, and for setting the safety. It consists of a lever (1) and indicator (2).

In the lever there are a recess (3) for passing the operating rod, a lever lug (4) which acts on the corresponding parts of the firing and trigger mechanism at various positions of the selector, right pin (5) which is placed in and rotates in the round parts of the variable hole in the right wall of the rcccivcr (see fig. 9), left pin (6) which is located in the hole in the left wall of the receiver.

The selector is prevented from falling out of the receiver by shoulder (7) and indicator (2).

The indicator has a grip (8) for rotating the indicator, and a lug (9) for retaining the selector in the desired position.

When the selector is set for the desired type of fire, lug (9) enters the corresponding recess in the right wall of the receiver (see fig. 9).

The selector grip also serves to protect the opening for the cocking handle when the rifle is set on safety.

There are in use rifles with stamped receiver in which the firing and trigger mechanism is not disassembled. The ends of the pins of the hammer, trigger, and full automatic scar of these rifles are staked and neld securely in the receiver.

The full automatic sear (fig. 40) of these rifles has a tubular pin (1) on the left end of which is installed the full automatic sear spring (2).

The short end of the full automatic sear spring is held in hole (3) and the long end (4) is held in a notch between the left wall of the receiver and the rear face of the receiver insert (fig. 41).

In rifles with stamped receiver, the selector (fig. 42) has a lever (1) with lug (la). An indicator (2) is attached to the lever.

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