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Old Cow Poo

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    Old Cow Poo

    This is not a POP contest entry, just some pics of my own private poo build that I tested not too long before the great hackening. Since we don't have a lot of old pics around here, I'll throw these up for fun.

    This was a base model trily from a rental fleet. I figured it ran on CO2 direct; it must be a simple build to throw a 12g changer and pump on there, right? Then I wanted to try some stock work, that was a chonk of work. Then I insisted on using a KPCS pump that a friend gave me. Then I wanted to half-block it with a hack saw and file, just for the experience (wtf, idk). While I was at it, I made a 3D printed trigger group (that seems to work just fine), a 12g caddy and a hood ornament. The first thing I fixed was the valve body, which had a notch worn in it from the stem. I drilled the seat out and made a stainless seat, which is mounted with red loctite.

    The stock is sort of a bird head grip. I learned from Walz' Papa Smurf build how to glue some thinner boards together and build up the body. I used some left over black walnut flooring plank. The grip lets you tuck the marker in pretty tight, and that is where the half-block idea came from. I shortened the bolt on the lathe by cutting out the middle and leaving a stub to red loctite it back together. The marker is held in by the one front screw. However, I used some rifle bedding compound to tighten the fit of the marker in the stock, the stock came out very tight and sturdy.

    Click image for larger version  Name:	IMG_20201127_194057561.jpg Views:	0 Size:	1.89 MB ID:	60834


    I used the trily reg body to make a bushing for the KPCS pump kit. I think I cut on the lathe, but you could probably hack saw it and file it back. I might have put an oring groove in there (?).


    The KPCS pump kit is self guided, so I ground the ram mount off. I never have decided to do anything with the finish yet.



    The bolt still has some sharpee marks on it. I hack sawed and filed the back off. I drilled and dremeled the cocking slot. I then hacked up the back block and mounted a set screw that hangs down to the hammer. Without a mill, I used a file to make a Sheridan style back-lip on the hammer. Pretty ugly, but it works. I think I used the dimensions from Big Matt's airsmith posts. That's something we need to repost.



    Anyhoo, I have it up around 260-270 fps. Just been having trouble finding some decent weather on top of pandemic play to really wring it out.
    Feedback

    https://www.mcarterbrown.com/forum/b...der-s-feedback

    #2
    Me likey

    Sent from my SM-N950U using Tapatalk

    Gas, Grass or Brass, no one rides for free...

    Comment


      #3
      This is some sweet looking pirate poo!
      Nice build
      need some picture of the trigger group, you used the original sear?
      💀Team Ragnastock💀

      Comment


      • Spider!

        Spider!

        commented
        Editing a comment
        Yes original sear. I'll get it apart Sunday.

      #4
      Here's the trigger group and the bedding. The bedding still has some putty residue from bedding and gorilla glue residue from the ornament. That knotted walnut is hard to keep straight. The group is two pieces, with brass pins. The trigger has a wide top slide with a ramp.

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      The top of the group.

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      The return spring and overtravel screw (/ spring guide).

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      and an unused pre-travel screw spot.

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      Feedback

      https://www.mcarterbrown.com/forum/b...der-s-feedback

      Comment


        #5
        and a print pic

        The trigger is laying backwards from the direction it is assembled. The ramp on the trigger slides under the tip of the sear arm. Not much load and mostly compression.

        Click image for larger version  Name:	triggergroup.png Views:	0 Size:	241.7 KB ID:	62754
        Feedback

        https://www.mcarterbrown.com/forum/b...der-s-feedback

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