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  • 2 Post By csmiffy
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  • 1 Post By ROKTOY
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Thread: Sportco 73a fix

  1. 26-09-2025, 03:04 PM #1
    csmiffy
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    Sportco 73a fix

    A loooong time ago I was given a 22 by @ROKTOY ?
    Been used as a home kill gun for a bit I think.
    The main issue was it blowing holes in the edge of the brass every couple of shots.
    Had one of these years ago and worked out the problem.
    The bolt striker and firing pin has assembled incorrectly as I had it and it allowed the firing pin to really give the chamber a bollocking.
    Never quite got around to it of just didn't have the nerve, also kept changing my mind on repairs.
    Bit the bullet the other night and pulled it to bits. The barrel was a PITA. Just tight enough to be a nuisance.
    As I've never pulled one out I have no experience so maybe they are all like this.
    Welded it up last night and dressed it back.
    Polished the chamber with some 1500 wet and dry today when no one was looking.
    Pics before and after.
    Middle pic was before polishing. You can see the transition between the weld metal and the old stuff.
    Probably reassemble tomorrow after I've finished my jobs at work.

    Name: 20250924_210321.jpg Views: 189 Size: 2.35 MB


    Name: 20250926_120212.jpg Views: 189 Size: 3.46 MB


    Name: 20250926_135416.jpg Views: 187 Size: 2.58 MB
    veitnamcam and erniec like this.
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  3. 26-09-2025, 03:13 PM #2
    blip
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    Did you mig it?
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  4. 26-09-2025, 04:41 PM #3
    csmiffy
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    Well I had some time this arvo...let's just leave that there lol.
    Put it back together.
    Even did a very quick mod to the silencer thread.
    It was quite long and the front sight was gone. Acquired a set for this from a good bugger on the forum whose name escaped me a couple of months back.
    Made a little threaded spacer about 4mm long and that should let me get the front sight back on.
    If I crack the shits with it I'll see what the front sight screw is and move it back a little and take the little spacer off.
    I bought some taps the other day but only the #6 and #8. If it's bigger than that I'm screwed hahaha see what I did there.


    Attachment 284430



    Attachment 284429
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  5. 26-09-2025, 04:41 PM #4
    csmiffy
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    Quote Originally Posted by blip View Post
    Did you mig it?
    Tig and my hands were struggling to keep steady doing that
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  6. 28-09-2025, 08:42 PM #5
    ROKTOY
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    Good to see it getting sorted.
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  7. 28-09-2025, 09:00 PM #6
    fawkes
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    cool job.
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    too old to die young
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  8. 29-09-2025, 12:25 PM #7
    csmiffy
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    Quote Originally Posted by ROKTOY View Post
    Good to see it getting sorted.
    @ROKTOY just have to find a set of rimfire rings in my stash (although I think most are rifle specific or weaver) or pinch one off the lever action and see how it shoots
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