S Operating

The operating rod (fig- 27) actuates the bolt*

To the operating rod are attached rod (1) with piston (2).

Rod (1) is integral with the piston; the rod is connected with the operating rod by Beans of threads (3) and pin (4), which is installed io hole (S) in the rod and the forward end of the operating rod.

Figure 26. Extractor

- flange for grasping cartridge case rim; lb -recess foT extractor spring; lc - recess for extractor pin; 2 - extractor spring (3-7); 3 -extractor pin (3-10); 3a

- notch in extractor pin-

Figure 27- Operating rod, assembled and disassembled*

1 - rod (3-2); 2 - piston; 3 - threads for connection with operating Tod; 4 - pin for connection of rod and gas piston rod (3-3); 5 - hole for pin; 6 - grooves; 7 - grooves.

Id the rod there ere four grooves (6) for decreasing its weight*

Piston (2) receives the pressure of the gases in the gas cylinder end transmits the pressure, through the gas piston rod to the operating rod. f

111 the piston there are grooves (7) for decreasing the escape of gases between the piston and the walls of the gas cylinder.

On the forward face of th<? piston there n sharp rim which scrapes off cerbon from the waits of the gas cylinder as the operating rod moves.

the operating rod (fig* 2B) has a lug in the rear portion with cylindrical channel (B) in which the rear end of tne bolt is installed. In the sides of the lug there are grooves (9) which guide the operating Tod in the receiver.

On the right side of the lug there is a lug (10) which disconnects the full automatic sear, and is called the full automatic disconnector.

On the left side the lug has a notch (11) for passing the ejector» a rear bevel (12) for snooth cocking of the hammer when the operating rod is moving to the rear, and a forward bevel (13) for depressing the cocked hammer as the operating rod is moving forward•

Ob the right side of the operating rod there is a cocking handle (14).

On the rear face of the operating rod there is a can (IS) for cocking the hammer when the operating rod starts to move to the rear.

tn tbe central portion of the operating rod there is a can surface (16) on which the bolt guide rides« The bolt is nade to move by neans of this groove, and also to rotate in opening and dosing the breech.

The cam has two screw bevels (a and b) which engage with the corresponding screw bevels of the bolt guide (see fig. 24) in opening and closing the breech.

The forward portion of the can surface is wider since it contains the bolt guide when the operating rod is in motion in opening and closing the breech. Before the breech is coapletely sealed, the rear perpendicular wall (c) guides the rear flat face of the bolt guide, as* a result of which the bolt moves forward

Figure 28. Operating rod (3-1).

Figure 28. Operating rod (3-1).

A. Right view; B. Bottom view.

5 - hole for pin; 8 - cylindrical channel for rear end of bolt; 9 - right groove; 10 - lug, which is called the automatic trigger disconnector; 11 - notch for ejector; 12 - rear bevel of lug; 13 - upper bevel of lug; 14 - cocking handle; 15 - cam or cocking hammer; 16 - cam surface; 17 - cylindrical portion of operating rod; 18 - hole for releasing air and excess oil; a - screw bevel; b - screw bevel; c - rear perpendicular wall; d - cam surface forward round wall; e - longitudinal wall.

Pictures Operating Rod Rifles
Figure 29. Return mechanism, assembled and disassembled (assy. 4).

1 - return spring (4-3); 2 - guide (4-1); 2a -connecting lug; 3 - guide rod (4-2); 3a - guide rod shoulder; 3b - washer notches; 4 - washer

together with the operating rod, thus excluding the possibility of its rotation before the breech is sealed. After the breech is opened, the cam surface forward round wall (d) guides the forward round face of the bolt guide, thus causing the bolt and the operating rod to move to the rear.

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