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Thread: started my pps43 semi build today

  1. #1
    Gunco Veteran panaceabeachbum's Avatar
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    Default started my pps43 semi build today

    Started working on installing a floating firing pin in the pps 43 bolt yesterday. The fixed firing pin is replaceable and just retained by the extractor. Just compress the extract spring and the extractor should drop out and the firing pin will fall out of the front of the bolt.
    The bottom of the hole is irregular as its split by the pocket for the extractor. I machined a piece of O-1 steel to .27 diam and pressed in the hole to support the bit , clamped the bolt in the 3 jaw chuck and then drilled the firing pin hole thru to the cross hole that the return sprin passes thru. Here is a pic


    clamped the bolt in the milling vise with the rear of bolt upward then drilled a hole thru to the return spring pocket. I now have a bolt with a 5/32 hole thru it lengthwise, not really sure whats next. Thinking I might cut the rear 1.5" of the bolt off and use it as a striker. any thoughts greatly appreciated

  2. #2
    Gunco Veteran panaceabeachbum's Avatar
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    here are a few more pics of the bolt, as soon as the kid gets home tonight with her camera I will post pics of the firing pin, its retainer , the bushing to reduce the hole size in the bolt face and the slot in the top of the bolt for the FA bolt blocking stud. I have a pretty decent sear idea , just need a reciever to put this thing together and finish my train of thought.





  3. #3
    Gunco Veteran panaceabeachbum's Avatar
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    her is the bushing pressed in the bolt face, I enlarged the hole for a depth of .4" creating a shoulder, then machined a bushing with .09 diam hole and pressed it firmly against the bottom of the hole in the bolt face. Shouldnt ever move as the shoulder will keep it from bieng pushed rearward.

  4. #4
    Gunco Veteran panaceabeachbum's Avatar
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    here is a pic of the firing pin in place , you can see the slot in the top to clear the FA bolt blocking pin that will be welded in the rec


  5. #5
    aka: SDK1968 dutigaf's Avatar
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    very cool,

    and just a note: you are really into brass arent you? noticed that you use a lot of it.. is that for the workability or do you own a brass warehouse? :-)
    say what you mean & mean what you say


  6. #6
    Gunco Veteran panaceabeachbum's Avatar
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    this pic show firing pin protrusion and the next is with the firing pin retracted






  7. #7
    Gunco Veteran panaceabeachbum's Avatar
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    Quote Originally Posted by dutigaf
    very cool,

    and just a note: you are really into brass arent you? noticed that you use a lot of it.. is that for the workability or do you own a brass warehouse? :-)
    I do like the ease of machining. I sell most of the hard to machine parts for the D+E 22 gatling build so I tend to work with it a lot as most of that gun is brass or bronze.




  8. #8
    Gunco Veteran panaceabeachbum's Avatar
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    finished up bolt , drilled striker for spring, drilled bolt for clearance of spring guide. and machined delrin buffer.


  9. #9
    Happy Camper hcpookie's Avatar
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    Looks nice. My wife really likes this gun and wants me to build her one.

    Do you know, can the PPSH41 mags work with the -43? I have a whole box of -41 mags and would hate to invest in a bunch of -43 mags just because they don't interchange... ???

  10. #10
    Gunco Veteran panaceabeachbum's Avatar
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    I dont think they interchange, all my 41 stuff is in the back of the shop so I cant pull out a mag to compare. There was a comparitive pic in SAR a few months ago but I dont remember the details

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