Astra 400 Disassembly Instructions
1. To field strip only, remove the magazine and make sure the chamber
is empty. Pull the slide to the rear and pivot the safety catch upward
as the slide returns forward until the lever engages, holding the slide
open. Rotate the barrel as shown until it's internal lugs disengage
from the frame and engage the slide. Pivot the safety catch "OFF."
Slide the barrel/slide assembly forward off the frame.
major disassembly, remove the magazine and make sure the chamber is
empty. Place pistol, muzzle up, on table. Depress barrel bushing with
magazine floorplate or suitable tool (.50AE casing or 1/2"ID PVC works
well). Turn barrel bushing lock either way until it engages the barrel
bushing and holds it in. Pointing the parts away from your face, grip
the barrel bushing and lock firmly in one hand, and the slide in the
other. Turn the barrel bushing and lock about 1/4 turn to release the
recoil spring. Be careful: The spring is strong and the parts will fly
apart suddenly if not restrained. Remove recoil spring, barrel bushing
and lock. Barrel and slide are removed from the frame as in field
L-shaped springs retain the extractor and the firing pin group. The
pins may be removed by prying up with a small screwdriver or punch
(this is what the tip of the cleaning rod is for). When reassembling
the firing pin group, align the cut-out on the firing pin extension
with the retaining pin hole before inserting the pin.
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D. Castelli, All Rights Reserved.
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