The SCK-65[1] was a Japanese prototype submachine gun that was produced by Shin Chūō Kōgyō K.K..
History[]
The SCK-65 was developed in 1965 and intended for use by domestic Japanese military and law enforcement use, to replace the aging M3A1 in JSDF service. The SCK-66 was introduced alongside it in 1966 and differed only in that it had a lower fire rate. However, the adoption of the Type 64 assault rifle eliminated any requirement for a new submachine gun and therefore both prototypes were rejected. A further improved model known as the SCK-68 was planned, but never produced.
Design[]
The SCK-65 was a blowback-operated submachine gun that fired from an open bolt. The ejection port featured a hinged dust cover that, when closed, would latch onto the bolt and prevent it from moving. A manual grip-activated safety lever was situated on the forward magazine housing, a featured borrowed from the Italian TZ-45. This required the user to press down on the safety grip in order to fire the gun, otherwise it would be rendered inoperable. The charging handle was located on the right side of the receiver, fixed to a long dust cover that concealed the cocking slot. The fire selector switch was located just above the pistol grip.
The cylindrical barrel jacket, which was detachable, was designed as a rudimentary sound muffler. A suppressor attachment could be fitted to the SCK-66, which would slot into the barrel jacket. The SCK-66 was also offered a plastic-coated magazine housing, so as to protect the user's hand from potential overheating of the steel body.
The differences between the SCK-65 and SCK-66 were minimal, with the SCK-65 firing at about 550rpm with a 680g bolt, and the SCK-66 firing at 465rpm with a slightly heavier 742g bolt. Both guns could feed from MP28.II magazines.
Gallery[]
References[]
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