PK Series Manual (English, 2005) - Forgotten Weapons
PK Series Manual (English, 2005) - Forgotten Weapons
PK Series Manual (English, 2005) - Forgotten Weapons
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Along the bottom, the receiver frame extends downward, and the lower leg of the feed<br />
pawl fits into this well. The round opening in the well serves to allow any water that<br />
might collect in the receiver to drain. The bracket for an ammunition box containing 100<br />
rounds is attached over the well. To the rear of the bracket for the ammunition box there<br />
is a rectangular opening for the trigger mechanism.<br />
The rear of the receiver frame is sealed by the gun stock bracket. The gun stock bracket<br />
consists of an upper and lower tab, each of which has holes for machine bolts that<br />
fasten the gun stock.<br />
The front of the bracket has two round openings: the upper, larger opening allows the<br />
passage of the guide of the operating rod assembly, and the lower, smaller opening<br />
allows bore sighting (when the gun stock has been removed) when the precision and<br />
accuracy of the machinegun is being tested. The top of the gun stock bracket is curved<br />
back at the front for latching the receiver cover closed.<br />
Barrel Socket. The barrel socket has a round opening on the top. Behind the opening<br />
there are two lugs for attaching the receiver cover and the feed plate. Behind the lugs<br />
there is a lateral groove for the barrel lock.<br />
On the front of the barrel lock there are the following: two lugs that prevent the barrel<br />
from twisting in the socket; a longitudinal cylindrical opening which holds the barrel; an<br />
oval groove which houses the rear finger of the barrel; a vertical slot for the gas cylinder<br />
latch; two studs for mounting on the frame of the tripod cradle; two profiled lugs and two<br />
arced grooves for fitting the machinegun support on the tripod for engaging targets in<br />
the air; on the bottom, a rectangular longitudinal slot and two longitudinal grooves for<br />
attaching the gas cylinder.<br />
Inside the barrel socket there are the following: lugs for holding the bolt in locked<br />
position and a lug with a beveled surface which allows the initial rotation of the bolt<br />
when it is locked.<br />
On its upper rear section the barrel socket has a longitudinal cutout for the ribs of the<br />
feed plate.<br />
UNCLASSIFIED<br />
I - 13
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