My second pre-b build (lots of frame mods, some welding, bluing etc)

Discussion in 'CZ Pistol Forums' started by Underwhere, May 29, 2018.

  1. Underwhere

    Underwhere Member

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    SP01SHADOW inspired me before to take on a refinishing of a CZ and helped me tremendously throughout my experience. I figured I'd post up for others to see.

    Here is my second build. It'll be quite a lot initially because I'm pretty much halfway through it.

    The rest will be much slower as I only work on this at night.

    Hopefully people can learn from this and also offer suggestions along my project. I'm always open to feedback and criticism.

    Here goes.

    I started with a Pre-b and disassembled it.
    Soaked in Klean Aircraft stripper for several days and arrived at my phosphate finish.

    No pics of the paint stripper. That's boring. 20180222_210708.jpeg
     
  2. Underwhere

    Underwhere Member

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    I started shaping the beavertail on the stripped frame.

    Sorry for all the sideways pictures. It shows up fine when I upload it but it goes crazy when I post.

    I cut a tab out of mild steel, used a file to flatten the current beavertail and TIG welded it on. Then I used a Dremel with sanding drums to rough shape it. I went back to the TIG maybe 20+ times over the course of 5 or 6 nights to get it to its final shape and finish.

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    Attached Files:

    Last edited: May 30, 2018

  3. Underwhere

    Underwhere Member

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    Next I worked on the squared trigger guard.

    I marked it with a sharpie to make sure I maintained a flat edge to it and filed and ground away. This took about 2 nights and I had to use the welder because there was a cavity in the casting of the frame that needed to be filled.

    Once a got the shape down I shoe shined it with 220 grit. 20180522_213609.jpeg 20180522_214313.jpeg 20180522_215524.jpeg 20180523_204446.jpeg 20180522_220918.jpeg
     
  4. Underwhere

    Underwhere Member

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    Next I undercut the trigger guard. I always get an irritation from the squared edge of the trigger guard on my middle finger.

    Much more comfortable now.

    Test fitting my wood grips. 20180523_221047.jpeg 20180523_221059.jpeg 20180523_221053.jpeg 20180524_223501.jpeg
     
  5. Underwhere

    Underwhere Member

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    Next comes the magwell shaping.
    The stock form comes too squared off for me.
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  6. Underwhere

    Underwhere Member

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    Next comes the recessing of my slide stop lever in the frame. 20180524_211925.jpeg 20180524_212144.jpeg
     
  7. Underwhere

    Underwhere Member

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    I rounded the front of the frame. Although this ruins the square lines up front, my fingers thank me as I often manipulate guns towards the front and having a squared off frame beats my fingers up.
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  8. Underwhere

    Underwhere Member

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    Next I polish ip the inside of the frame.
    I'd rather polish now before bluing.

    Rails
    Flat where disconnector rides
    Sides of frame where trigger bar contacts
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  9. Underwhere

    Underwhere Member

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    Then I start on the slide.

    I polish the rails
    I round the back of the slide for the hammer to more easily cock. 20180529_220600.jpeg 20180529_220613.jpeg
     
  10. Underwhere

    Underwhere Member

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    I forgot to mention I put in a full length guide rod and flushed it with the frame.

    This was not my best work. I opened up the hole too big. It is what it is now.

    I have since made much progress on guide rods. My newest ones look better than factory. 20180529_220546.jpeg 20180529_220553.jpeg
     
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  11. Underwhere

    Underwhere Member

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    So here the gun sits now.

    I have a bit more polishing to do before the bath in Evaporust 20180529_220855.jpeg 20180529_220905.jpeg
     
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  12. Underwhere

    Underwhere Member

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    I need to go over the gun again to make sure the metal work and polishing is done.

    I need to polish the firing pin channel and clean up all the controls that will be blued.

    Once comfortable with the metal work i'll test fit all the internal components just in case....then prep for bluing.
     
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  13. SPO1SHADOW

    SPO1SHADOW Member

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    Most excellent work my Brother! You could make a fortune putting beavertails on Browning Hi Powers like that. Carry on i am really enjoying the ride.
     
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  14. Underwhere

    Underwhere Member

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    So tonight was an exploratory night.
    I had in the past polished the barrel bushing and crown because I like a nice thick shiny muzzle.

    I saw that someone had taken an 11 degree crown to both the barrel and bushing so I figured I'd give that a shot.

    I took a barrel brush, inserted into the barrel and threw the back into a drill to spin it. I used a Dremel to shorten the barrel until flush with the bushing.

    Then I hit it with the 11 degree crown.

    It was as easy as I had hoped and turned out better than I expected. I really like it. 20180531_212629.jpeg 20180531_211830.jpeg 20180531_212953.jpeg 20180531_221344.jpeg 20180531_222422.jpeg 20180531_222500.jpeg
     
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  15. bar-the-exit

    bar-the-exit Banned Member

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    That "fat" bushing is quite a look.
     
  16. Goju

    Goju Member

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    I like as well. And really nice work on the profile of the trigger guard!
     
  17. Underwhere

    Underwhere Member

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    I realized I screwed up a bit.
    I have a lot of projects going on and totally forgot this was a pre-b with a firing pin retaining plate.

    So I rounded the back of the slide without the plate in (thinking this was a modern slide)

    When I went to test fit the parts to be blued I realized my mistake.

    So I attempted to blend the 2 pieces together after tossing a firing pin into the channel.

    I hope I don't feel a noticeable bump as the slide reciprocates. Maybe I might. It is what it is. I don't think I want to try and weld this to fill it. 20180604_224116.jpeg 20180604_212743.jpeg 20180604_213344.jpeg 20180604_213628.jpeg 20180604_224013.jpeg
     
  18. Underwhere

    Underwhere Member

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    I removed my 10x bushing to prep everything for bluing. I am going to recrown once fully assembled to make sure that I can fix any rotation the 10x bushing makes once I toss it back in.

    I took a stainless carding brush to clean out the roll marks.

    I gathered all my to-be-blued parts and gave them a bath with Dawn dish washing liquid. I tried getting every nook and cranny with a brush and q-tips.

    After drying they went for a swim in Evaporust.

    Done for tonight.
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