Astra cub .22 short firing pin removal, barrel wear and FYI - Gunner Forum
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Astra cub .22 short firing pin removal, barrel wear and FYI

This is a discussion on Astra cub .22 short firing pin removal, barrel wear and FYI within the Semi Auto Pistols forums, part of the Handgun Forum category; I just thought I would post my information for Internet Archival and to help the present & future owners of the Astra Cub .22short This ...


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Old 12-28-2014, 01:26 PM   #1
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From: Fort Wayne, IN.
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Astra cub .22 short firing pin removal, barrel wear and FYI

I just thought I would post my information for Internet Archival and to help the present & future owners of the Astra Cub .22short

This Astra Cub .22 short used to be my fathers. My cousin ended up with it and passed it on to me when he came back to town. He advised it would not fire and that was all he knew.

After looking into it - I decided to replace the firing pin, firing pin spring and the extractor spring. I purchased the parts from ?Numrich based in New York of all places.

First test fire. I loaded one round from the magazine and squeezed the trigger = nothing!. Looking at the brass case you could see a slight indentation in the rim fire area from the firing pin.
I tried another = BOOM. she went off. After several single feeds with a few more failures to fire - I tried a full magazine that eventually led to a "stove pipe" condition.

It appears that the slide is not fully going to the "home" / locked position. The cause may be a combination of things. Weak slide spring, barrel wear..??..etc

If you manually rack a round "gently" the slide does not overcome the force needed to spread out the ejector catch (near the barrel area) enough to allow the breach to fully close.
Also the spent brass case is showing signs of bulging out, near where barrel and the extractor come into contact.!


(I added some pics - hope to add more)
The firing pins show new VS old. Overall length shown as resting on a table
Barrel pic.. Shows dry firing damage as well as a very thin wall..I do not have a new barrel to compare it to. The bullet is a loose fit in mine!
Slide pic
Attached Images
File Type: jpg Astra_FPbarrellWear.jpg (157.8 KB, 37 views)
File Type: jpg Astra_firingpin.jpg (68.9 KB, 34 views)
File Type: jpg Astra_specs.jpg (75.3 KB, 29 views)
File Type: jpg Astra_firingpin3.jpg (112.0 KB, 29 views)
File Type: jpg Astra_firingpin2.jpg (177.5 KB, 31 views)

Last edited by namyzzo; 12-28-2014 at 01:56 PM. Reason: more info
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Old 12-28-2014, 01:46 PM   #2
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From: Fort Wayne, IN.
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..pics continued

..a few more pics

Barrel removed by: Remove magazine, enable the safety / slide lock and rack the slide back to be held open. Twist the end of the barrel 90deg and it will pull out

Extractor removal: Release slide gently and slide it off of the frame. Flip over the slide and you will see a flat sided pin. Use a dental pick to lift it out while keeping pressure on the extractor so as to not lose the extractor spring.

Firing Pin removal: From the underneath side of the slide, you can see a hole. This hole is off-set. Using a small punch you can drive the retaining pin out of the slide. The firing pin or the retaining pin had burred up a little - so the firing pin required a little force to remove from the slide. Using the same dental pick - press through the small hole where the firing pin would protrude as it strikes the shell - and it will come out the backside.
note: ( It took me awhile to decide how to remove the firing pin. From the top of the slide you can see the retaining pin - but since its hole is drilled off-set - it made me wonder if it was infact the retaining pin at all = gun shy I guess..LOL )

Removing one of the grips retained by a single screw = you will find a few identification marks that will advise of the year made (sorry I don't have the link that deciphers this for you)

Hammer does appear to have a semi cocked position that will keep the hammer away from the firing pin during storage.

Nice little gun - but probably not worth any more repairs to make it reliable.. Barrell, slide spring and a new magazine - on top of what I have already spent would, at this point probably come close to a new replacement..
Attached Images
File Type: jpg Astra_overall.jpg (201.2 KB, 19 views)
File Type: jpg ASTRA-Unceta_CUB22short.jpg (187.4 KB, 28 views)
File Type: jpg astra.jpg (134.6 KB, 25 views)

Last edited by namyzzo; 12-28-2014 at 02:00 PM. Reason: added more pics
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Old 12-28-2014, 04:37 PM   #3
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Astra made the Jr Colt for Colt which is the same as your Cub . Remember the 22 Lr and 25 Auto parts are different then the 22 short . FIE didn't make a 22 short if I remember correctly
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Old 07-02-2016, 05:22 PM   #4
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Does the Astra firing pin fit the Colt Junior in 22 cal ? Thanks Jim
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Old 07-04-2016, 05:19 AM   #5
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Quote:
Originally Posted by jameseslr View Post
Does the Astra firing pin fit the Colt Junior in 22 cal ? Thanks Jim
It should since they are the same gun made by the same people and made on the same machinery . Like most gun part most need minor fitting . They are not Glocks parts
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Old 11-22-2016, 12:50 AM   #6
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From: colombo
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Hi, I've read about the firing pin removal. thanks for the information. I've removed the retaining pin anyhow. but the firing pin can not move out. Can anyone explain it more deeper, with some photos? thank you
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