By E. J. HOFFSCHMIDT
Designed by Kijiro Nambu, the Type 94 (1934) Japanese Service pistol was chambered for the rimless 8 mm. Nambu Japanese service cartridge. This bottleneck cartridge was also used in Japanese Type 14 (1925) semi-automatic Service pistols and in Japanese submachine guns. A Nambu-designed semi-automatic pistol introduced about 1904 was also adapted for this round.
The recoil-operated Type 94 pistol has a device to lock barrel and slide together until the bullet has cleared the barrel and gas pressure has subsided. The detachable magazine housed in the grip holds 6 cartridges.
Safety devices on this arm are (1) a manual safety which locks the external sear and trigger bar and (2) a safety activated by the magazine catch mechanism. When the magazine catch button on the left side of the frame is depressed and the magazine is withdrawn from the grip, a bar rises to engage a detent notch in the rear of the trigger and thus block rearward movement of the trigger.
Other mechanical features of note in the Type 94 pistol include an independent spring-loaded firing pin, an internal, concealed hammer, and a lanyard ring attached to the rear of the frame. Grip plates are commonly of coarsely checkered black plastic, but smooth wood grips are also found on this arm.
A unique and potentially dangerous feature of the Type 94 pistol is that it can be fired by depressing the front end of the external sear and trigger bar which lies exposed in a slot milled in the left side of the frame. Also, the safety mechanism is not reliable.
The average Type 94 pistol is roughly machined and finished, showing hasty wartime manufacture.
1. Front sight
5. Firing pin spring
6. Firing pin
7. Recoil spring
8. Recoil spring collar
11. Locking block
13. Hammer roller pin
14. Hammer roller
15. Hammer spring
16. Sear hinge pin
17. Magazine catch
18. Right grip
19. Grip screw
21. Disconnector pin
22. Disconnector spring
23. Trigger spring
25. Trigger screw
26. Sear spring
27. Sear and trigger bar
28. Magazine catch nut
29. Magazine catch spring
30. Magazine operated safety
31. Magazine safety spring
32. Hammer screw
33. Safety catch
36. Left grip
37. Grip screw
IThe first step in disassembling the Type 94 pistol is to pull the slide to the rear over an empty magazine. The slide (2) and the breechbolt (4) will be held to the rear. Push the firing pin (6) forward until it is flush with the shoulder in the slide; this will free the crossbolt (10). The crossbolt can then be pushed out of the slide from right to left as shown.
4 The magazine catch nut (28) is sometimes peened or riveted to the shaft of the magazine catch (17). It can be unscrewed with a screwdriver ground to the shape shown or,/if difficulty is encountered, with the aid of pliers or a vise.
After removing left grip screw (37) and left grip (36), drift out sear hinge pin (16) from bottom. Remove trigger screw (25) and disengage trigger (24).
2 After the breechbolt has been removed, the slide may stay in place. To remove the breechbolt first take out the magazine (35). Then, holding the gun as shown, push the barrel (9) back while holding the slide. This action unlocks the slide and permits it to be eased off the front of the frame (34).
5 The safety catch has a detent on the inner face which retains the catch in the "on" or "off" position. The safety catch (33) blocks only the sear. To remove the safety catch, remove the left grip (36), lift the catch out of engagement with frame, and swing it down. The safety catch can then be lifted out.
3 When reassembling the gun, place the locking block (11) in the frame correctly so that the yoke on the barrel can fit over the curved surface of it. The barrel must be installed in the frame before putting the slide back on. The recoil spring collar (8) must be installed with the solid face toward the chamber.
6 The extractor (3) is of simple design.
The tail is dove-tailed into the top of the breechbolt. To remove the extractor, with a screwdriver push the front of the extractor outward far enough for the projection on the extractor to clear its seat in the bolt. When it is free, pry the extractor out as shown. ■
Nambu Pattern 94 tmm. Automatic
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