Montneel Zpump

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  • capitalpaintball
    Bunker Buster
    • Jul 2020
    • 298
    • Coventry, Rhode Island

    #1

    Montneel Zpump

    Click image for larger version  Name:	20251018_164216.jpg Views:	0 Size:	2.77 MB ID:	749229 Click image for larger version  Name:	20251018_164228.jpg Views:	0 Size:	2.84 MB ID:	749230 I have always wanted a J-mark pump, but since thats never going to happen, I decided to Zpump a Z1.
    Its a full conversion and you need to pump it to cock the hammer and load the round. I had some issue with velocity using air, so I added a volume chamber to the side of the valve. Thanks to Chris for the base gun.

    Now velocity is well over 300fps and i can use the choke screw to dial it in.

    This build has led to an interesting discovery for the Montneel guns.
    My Mega-Z is setup for syphon co2, but I wanted to test my volume chamber before I drilled the pump body. so I tested it on it and without the volumizer I was getting 150 fps with air, with the volumizer I was getting 196fps. On the Zpump it went from 240s to 317.

    If a volume chamber could be made to connect the vert asa and the valve, air might finally be an option. My volume chamber is an old lp reg from a cocker gutted and drilled out then plugged the vent and output hole.
    Last edited by capitalpaintball; 10-18-2025, 06:59 PM.
  • Painthappy
    Administrator
    • Jul 2020
    • 2547
    • New Boston, NH

    #2
    I love this!
    I am the admin...

    Comment

    • Ecapnation
      MCB Member
      • Jul 2020
      • 4210
      • South Central Long Island

      #3
      I know the guy who made the j marks personally and can't get one... Love the work!

      Comment

      • NONOBLITUS
        đź’€Ragnastock President đź’€
        • Jul 2020
        • 1963
        • Connecticut

        #4
        Hahah It’s Chris , it came out awesome

        Comment


        • capitalpaintball
          capitalpaintball commented
          Editing a comment
          can i blame MCB autocorrect? lol
      • NONOBLITUS
        đź’€Ragnastock President đź’€
        • Jul 2020
        • 1963
        • Connecticut

        #5
        Paging DocsMachine is the volumizer something that could be a possibility out of your shop.

        Comment

        • NONOBLITUS
          đź’€Ragnastock President đź’€
          • Jul 2020
          • 1963
          • Connecticut

          #6
          How exactly does a Volumizer actually work ? I am super interested in this for my Mega Z

          Comment

          • Ecapnation
            MCB Member
            • Jul 2020
            • 4210
            • South Central Long Island

            #7
            Originally posted by NONOBLITUS
            How exactly does a Volumizer actually work ? I am super interested in this for my Mega Z
            You need more air volume to run compressed air as it doesn't rapidly expend like liquid co2

            Comment

            • BLachance75
              Administrator
              • Jul 2020
              • 1114
              • Western MA

              #8
              I have a Z1 somewhere that may need to go under the knife
              Red One

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