A better Umarex T4E HDR50/TR50 paintball revolver velocity mod.

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  • William the Third
    I do cocaine!
    • Jul 2020
    • 1099
    • WNC

    #1

    A better Umarex T4E HDR50/TR50 paintball revolver velocity mod.

    So this is a project I've been working on since June 2019. 2020 put a damper on things, but it's something I'd like to get moving on again. Those of you who were members on MCB around that time likely remember the thread in the Members Only section. This is an adjustable velocity mod that also improves air efficiency. I'm finally at the point I want to move to production, but I'd like to gauge interest before doing so. It also looks like it may work with this new pistol of theirs, but I have yet to confirm this.

    Here is a video of Prototype 0 from June 2019. This one proved the concept, but wasn't adjustable, so velocity was temperature dependent. In the high 60's/low 70's (a weird cold front moved through, it's not usually that cool here in June), like in the video, it was spot on. When you got into the high 80's/low 90's, velocity spiked over 300 fps again, which required an adjustable version be designed. The adjustment required the loss of the aired up indicator/degas button, but did not require any permanent modifications. Everything can be undone and returned to as from the factory.
    I can haz feedback?
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  • William the Third
    I do cocaine!
    • Jul 2020
    • 1099
    • WNC

    #2
    Some things I forgot in the initial post. I'm expecting them to sell in the $30~$35 range, and I will offer a service to install these. Installation service expected price will be $25 (in US, outside US price will depend on shipping cost), and includes return shipping. They are not hard to install, but do require pretty significant disassembly of the marker, which may not be something everyone is willing to do. These should be available mid-April, should there be enough interest to justify manufacturing.
    I can haz feedback?
    If I owe you feedback, just remind me, as I sometimes forget.

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    • Trbo323
      MCB Member
      • Jul 2020
      • 6358
      • Vancouver WA

      #3
      I'm interested. I don't have one of these pistols yet but do plan on buying one. One of my largest hesitations has been the velocity issues

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      • Trbo323
        MCB Member
        • Jul 2020
        • 6358
        • Vancouver WA

        #4
        Will it work with this?

        https://www.ansgear.com/First_Strike...volver-blk.htm

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        • XEMON
          Frenchy is here!
          • Jul 2020
          • 3029
          • Nor Cal

          #5
          Originally posted by Trbo323
          Will it work with this?

          https://www.ansgear.com/First_Strike...volver-blk.htm

          Sent from my Moto Z (2) using Tapatalk
          probably not ... completely different design.
          The above velocity adjuster uses the "pop-up pressure indication" used on Umarex valves
          Love my brass ... Love my SSR ... Hard choices ...

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          • Toestr
            Certified Post Whore
            • Jul 2020
            • 2871
            • Poland, Onterrible

            #6
            Ya, the Umarex is a blow forward, while the Roscoe is a traditional hammer firing revolver.

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            • somethingbenign
              Newbie
              • Jul 2020
              • 11
              • Omaha, NE

              #7
              I have been holding off on buying one of the 50 cal revolvers in part because I was waiting for a usable way to adjust the velocity. These become available I'll snag at least one.

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              • weekendballer
                Bunker Buster
                • Jul 2020
                • 133

                #8
                I would be interested in one

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                • alathorn
                  Newbie
                  • Mar 2021
                  • 6

                  #9
                  Yes i would want one. Prob sell on ebay well

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                  • William the Third
                    I do cocaine!
                    • Jul 2020
                    • 1099
                    • WNC

                    #10
                    I've started a "pre-order" thread here.
                    I can haz feedback?
                    If I owe you feedback, just remind me, as I sometimes forget.

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                    • William the Third
                      I do cocaine!
                      • Jul 2020
                      • 1099
                      • WNC

                      #11
                      Getting closer to having these available for sale soon. Here is a video of the adjuster in action.


                      Here are some pictures of the adjuster. It was designed to be modular so spacers can be removed/added as needed to achieve target velocity.

                      I can haz feedback?
                      If I owe you feedback, just remind me, as I sometimes forget.

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                      • Arthur
                        ︻デ═一 *** ** *
                        • Jul 2020
                        • 665

                        #12
                        Vince d00d

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                        • LeBoucher
                          Newbie
                          • May 2021
                          • 2

                          #13
                          I'm also interested by your final product. Keep us posted. Thanks for sharing this.

                          Comment

                          • sojo
                            Newbie
                            • May 2021
                            • 1

                            #14
                            this looks very promising.

                            Comment

                            • Tom1980
                              Newbie
                              • Jun 2021
                              • 1

                              #15
                              Thats exactly what I was looking for.

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