To the rear of the disconnector is the recoil lug hole (5). The barrel threads into the forward part of the receiver (3), except on the later Chinese models in which the barrels are pinned in place.On the right side, immediately behind the breech, an ejection port (4) was machined 0.55 inches deep and 2.5 inches long to allow empty cartridge cases to be ejected. The receiver cover rests on this lower portion and is secured at the rear of the receiver by a captive pin which enters from the right. Behind the bolt carrier guide lugs (halfway to the rear of the receiver) are rails (2) on which the bolt carrier moves, cut 0.11 inches lower. The receiver interior contains guide lugs (1) on either side of the bolt immediately behind the breech. The stamped receiver was reinforced with blocks of metal at the front and rear of the receiver and was riveted together. It appears to have been manufactured in limited quantities only in China. The Type 3 receiver was stamped from sheet metal. The 0.157 inch diameter hole for the barrel pin was 0.497 inches behind the face of the receiver and 0.310 inches above the bottom. The barrel was held by a pin +/- 0.157 inches in diameter.Ī 1.100 long by 0.185 inch high step was cut in the breech face of the Type 2 receiver for the forward stock lug. It accepted an unthreaded barrel which was pinned in place. In 1967, a Type 2 receiver was developed in China which was not threaded. Instead, the gas piston tunnel housing is faired smoothly into the receiver.Ĭhinese-produced SKS Carbines until 1967 also used the Type 1B threaded receiver and threaded barrel. The Type 1B receiver lacks this squared platform. The left side is scalloped into the side of the receiver. The Type 1A receiver will have a raised, squared platform 0.15 inches high by 0.8 inches long. The earliest receivers (Type 1A) are distinguished by observing the right and left sides immediately under the gas piston tunnel housing. SKS Carbines manufactured by Russian, Yugoslavian, East German, North Korean and North Vietnamese factories used the Type 1 receiver which was threaded to receive a threaded barrel. Three types of receivers were manufactured for the SKS Carbine. It is 9.5 inches long by 1.2 inches wide and 2.4 inches high (including the forward receiver lug to which the magazine attaches). It is machined from a solid steel billet in all countries with the single exception of a stamped receiver made in China. SKS receiver serves to join the carbines firing components and mechanism, to ensure the covering of the barrel bore by the bolt and locking of the bolt.
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