Weight Of Firing Pin Of Ak47 Rifle

The bolt (fig. 23) serves to push the rounds into the chamber, seal the bore and extract the cartridges cases from the chamber*

1 - threaded portion of sight;

2 - longitudinal groove; 3 - flat edges for key.

Figure 22. Front

1 - threaded hole;

2 - alinement index.

Figure 23. Bolt, assembled and disassembled (assy. (3-2).

3 - extractor (3-6); 4 - extractor spring (3-7); 5 - extractor pin (3-10); 6 - retaining pin (3-9).

The bolt consists of a body (1), firing pin (2), extractor (3) with spring (4) and pin (5), and pin (6).

The bolt body (fig. 24) serves to hold all the components of the bolt. The body consists of a holt head, central cylindrical portion (2), and rear cylindrical portion {3).

The holt head has a right (4) and left (5) lugs; guide lug (6); feed rib (7), the forward edge of which pushes out the rounds from the nagazine feed block into the chamber; recess (a) for the extractor and spring; housing (9) for holding the cartridge case rim.

The bolt lugs engage the receiver lugs to seal the bore. The left lug (5) has a bevel, which together with the scrcw bevel of the cam (30) (see fig, 10) rotates the holt a certain amount when the bore is about to be sealed. The lower edge (10) of the right lug together with the receiver can limits rotation of the bolt to the right when the bore is being sealed.

The bolt is moved and rotated in sealing and opening the bore by means of the leading edge (6) of the bolt, which is guided by the walls of the groove in the operating rod-

The guide lug has a rear flat facc (a), screw bevel (b), forward round face (c), and scrcw bevel (d).

The rear face (a) of the guide lug is guided by the variable groove of the operating rod when the latter is moving forward, thus causing the bolt to iovg forward until the bore Starts to be sealed«

The scrcw bevel (b) of the guide lug is guided by the screw bevel of the variable groove in the operating rod, thus causing the bolt to rotate when the bore is being sealed.

The screw bevel (d) of the guide lug is guided by the screw bevel of the variable groove in the operating rod, thus causing the bolt to rotate when the bore is being opened.

The forward face (c) of the guide lug is guided by the forward wall of the variable groove in the operating rod when it is moving to the rear, thus causing the bolt to move to the rear after the bore is opened.

The left edge (e) of the guide lug, together with the straight wall of the variable groove in the operating rod, keeps the bolt fro* rotating to the left when the bore is sealed.

In addition, in the bolt head there is a hole (11) for the extractor pin and a hole (12) for the firing pin retaining pin.

1 - bolt head; 2 - central cylindrical portion; 3 - rear cylindrical portion; 4 -right lug; 5 - left lug; 6 - guide lug; 7 -feed lever; 8 - recess for extractor and spring; 9 - face; 10 - lower edge of right lug; 11 - hole for extractor pin; 12 - hole for retaining pin; 13 - longitudinal groove for extractor; 14 - channel for firing pin; 15 - hole for passing tip of firing pin; a -rear flat face of guide lug; b - screw bevel of guide lug; c - forward face of guide lug;

Ak47 Round Flat Firing Pin
Figure 25. Firing pin (3-5).

1 - tip of firing pin; 2 - longitudinal grooves for decreasing weight of firing pin and decreasing friction between firing pin and bolt body; 3 - notch for retaining

Tho hole for the extractor pin has a saaller diameter at the bottom than the diameter of the pin, thus forming a circular shoulder in the bole*

In the body there is a longitudinal groove (13) for passing the extractor; in the rear portion, the groove is made wider for passing the extractor when the bolt is rotating as the bore is being sealed or opened*

In the center of the body there is e channel (14) for housing the firing pin. In the forward portion the channel is conical in shape, and the other end terminates in a hole (IS) for passing the tip of the firing pin«

The firing pin (fig. 2S), together with the hauler, pierces the primer of the round.

The firing pin is divided into the rear and the forward portion» Tbe forward portion terminates in the tip of the firing pin (1); in the rear portion there are three longitudinal frooves (2) for decreasing tne weight of the firing pin and or decreasing friction as it moves in the channel in the bolt body.

The firing pin is prevented from falling out of the body by pin (6) (fig- 23)p by means of the notch (3) in the firing pin.

The extractor (fig- 26) with spring (2) removes the cartridge case from the chamber and holds it in the bolt housing until it meets the ejector.

The extractor has a flange (la) for grasping the cartridge case ria, a recess (lb) for extractor spring, and a recess (ic) for extractor pin.

The extractor with spring is installed in the bolt head by means of pin (3). The extractor pin is prevented fro* falling out of its hole by pin (6) (see fig. 25) and the shoulder in the hole for the pin.

0 0

Post a comment