Remove the magazine and cock the hammer. Pull down the latch located in front of trigger and pull the slide fully to the rear.
With the slide now fully retracted it may be lifted and removed from the frame. Further disassembly is not recommended.
Astra Models 400 and 600 Pistols
By E. J. HOFFSCHMIDT
The Spanish-made Astra Model 400 (Model 1921) semi-automatic pistol is a blowback-operated arm. That is, the breech is not locked in firing. A locked breech is usually considered necessary to handle the more powerful 9 mm. loads, but in the Model 400 pistol the opening of the breech is delayed through the use of a heavy slide and a powerful recoil spring.
The standard Astra Model 400 pistol will fire either the 9 mm. Largo (9 mm.
1. Barrel bushing lock
2. Barrel bushing
3. Recoil spring
6. Extractor spring
7. Firing pin retainer pin
8. Extractor retainer pin
9. Firing pin spring
10. Firing pin
15. Sear spring
16. Safety catch detent
17. Detent spring
18. Slide stop
20. Hammer pin
21. Right grip
22. Grip safety
23. Grip safety spring
24. Magazine catch
25. Grip safety pin
26. Magazine catch stop
27. Upper spring plunger
28. Hammer spring
29. Lower spring plunger
32. Trigger pin
34. Trigger bar pin
35. Trigger bar
37. Spring plunger
38. Safety catch
39. Magazine safety pin
40. Magazine safety spring
41. Magazine safety
42. Left grip
Bergmann) cartridge or the .38 Automatic Colt Pistol cartridge.
During World War II the German Army obtained the Astra pistol in cal. 9 mm. Parabellum (9 mm. Luger). This gun is known as the Model 600 and has the inscription "PIST. PATR. 08" stamped on the barrel opposite the ejection port in the slide. Model 600 pistols used by the German Army have the German Ordnance acceptance mark on the right side of the grip overhang. After
World War II, 14,000 Model 600 pistols were sold to West Germany for police use. It is also offered commercially.
There are several safety features in the Models 400 and 600 pistols. A thumb safety locks the trigger and slide, and a grip safety locks the sear. A magazine safety blocks the trigger when the magazine is removed.
Disassembly procedures for the Models 400 and 600 pistols are essentially identical.
1 Mechanically, the Models 400 and 600 are similar. The Model 600 is V4" shorter. The front-to-back grip depth is less in the Model 600 because of the shorter cartridge it fires. Most parts are not interchangeable but the takedown sequence is similar.
4L-shaped retainer pins (7 & 8) retain the extractor (5) and the firing pin extension (11). Remove pins by prying up with a small screwdriver or punch. When reassembling firing pin spring (9), firing pin (10), and firing pin extension (11), align cut-out on the firing pin extension before inserting the retainer pin (7).
2 To field strip for general cleaning, first clear chamber and remove magazine (30). Pull slide (4) to rear, then rotate safety catch (38) up as slide is moved forward until catch engages slide. Rotate barrel (12) as shown, until it is released from frame (31) and engaged with slide. Release safety catch and move barrel and slide forward off frame.
5 Remove the 4 grip screws (43) and the grips (21 & 42). Replace magazine (30) in frame. Insert punch through hole in frame below trigger bar (35). Hold hammer (13) with thumb and pull trigger, allowing hammer to fall until upper plunger (27) stops against punch. Remove magazine. Drift out hammer pin (20) from left side and remove hammer. Hold upper plunger with drift and remove punch. Remove upper and lower plungers (27 & 29) and hammer spring (28). (Model 600 has no lower plunger.)
3 To disassemble, first clear chamber and remove magazine. Place pistol, muzzle up, on table. Depress barrel bushing (2) with magazine floorplate or screwdriver. Turn barrel bushing lock (1) either way until it holds barrel bushing. Grip barrel bushing and lock firmly with both hands and turn lock about l/4-turn, releasing recoil spring (3). Remove recoil spring, bushing, and lock. Barrel and slide are removed from frame as in field stripping.
5 Most Model 400 pistols have magazine catch as shown here. Remove magazine catch stop (26). Drift out grip safety pin (25), remove grip safety* (22), and push out magazine catch (24) in direction indicated. It is unnecessary to remove side magazine catch on late Models 400 and 600 pistols. ■
Astra Model 400 Pistol
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