cutting the sear arm

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  • knownothingmags
    RKM 3D Designs

    • Apr 2010
    • 4810

    #1

    cutting the sear arm

    so i want to do is make a nasty/dual mag.
    benn wanting to do it for about 10 years now just didnt know enough, still dont

    so what im asking is, if i take and cut the sear arm shorter (the part the sear rod attatches to) and actuate the sear arm with the mpa 3 ram right at the end where i cut it will it stil actuate the same.

    im asking because im in the process of putting together two projects that this will apply to and just wondering if this will effect the performance of shooting.

    thankyou for any and all help.

    ,
    KNM
    logoRKM 3D Designs
  • knownothingmags
    RKM 3D Designs

    • Apr 2010
    • 4810

    #2
    reserve for pics to explain more.
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    • OPBN
      OldPBNoob

      • Sep 2008
      • 5240

      #3
      I think Flatliner did something very simliar to what you are describing in having the MPA3 facing up towards the rail and striking the bottom of the sear.

      I had been thinking about something like this a well, but couldnt work it out in my head. Kinda figured if it was easy more people would have done it already. I envisioned a custom milled dual rail that positioned the bodies in a sort of inverted V formation. Or having the rails mount to some sort of block that again held the rails in a upside down V offered potential. ... I never got farther than that.
      My AO Feedback

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      • knownothingmags
        RKM 3D Designs

        • Apr 2010
        • 4810

        #4
        Originally posted by OPBN
        I think Flatliner did something very simliar to what you are describing in having the MPA3 facing up towards the rail and striking the bottom of the sear.

        I had been thinking about something like this a well, but couldnt work it out in my head. Kinda figured if it was easy more people would have done it already. I envisioned a custom milled dual rail that positioned the bodies in a sort of inverted V formation. Or having the rails mount to some sort of block that again held the rails in a upside down V offered potential. ... I never got farther than that.
        yeah that is what im thinking, as well. ill have to draw it up see if i can prototype some stuff with my 3d printer or peice if together and and then measure the final mesurments, and have the final product milled from billet.

        im still cycling stuff in my head.
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        • sQuidvision
          Learning Mag-Fu

          • Jun 2011
          • 823

          #5
          what kind of rail setup do you have currently? i have a couple ideas but would want to make sure they fit in what you are working with.

          Comment

          • knownothingmags
            RKM 3D Designs

            • Apr 2010
            • 4810

            #6
            Originally posted by sQuidvision
            what kind of rail setup do you have currently? i have a couple ideas but would want to make sure they fit in what you are working with.
            im using or will be using 3 shadow rails and 3 xmt minimag bodies
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            • athomas
              Of course it works-its AGD
              • Jan 2002
              • 8039

              #7
              Anything that can move the sear will work. You need to be aware of the changes in required force and the distance of travel when moving actuation points, though. If you shorten the distance from the center of the pivot to the point of contact, you will decrease the movement required for the actuator but will increase the required amount of force to activate the sear. This may not be a problem, but you need to be aware of it.
              Except for the Automag in front, its usually the man behind the equipment that counts.

              Comment

              • Flatliner333
                3X MOTY Winner :P

                • Mar 2009
                • 1286

                #8
                What if you built a block to hold 3 AM/MM rails side by side. Have one long sear pin that ran through all 3 rails (you would have to cut the slots out of the middle rail). Have the 3 sears welded solid to the 1 long pin and cut the arms off the outer 2 sears. Like this
                sigpic

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                • knownothingmags
                  RKM 3D Designs

                  • Apr 2010
                  • 4810

                  #9
                  Originally posted by athomas
                  Anything that can move the sear will work. You need to be aware of the changes in required force and the distance of travel when moving actuation points, though. If you shorten the distance from the center of the pivot to the point of contact, you will decrease the movement required for the actuator but will increase the required amount of force to activate the sear. This may not be a problem, but you need to be aware of it.
                  yeah leverage, got it.

                  thankyou,
                  KNM
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                  • knownothingmags
                    RKM 3D Designs

                    • Apr 2010
                    • 4810

                    #10
                    Originally posted by Flatliner333
                    What if you built a block to hold 3 AM/MM rails side by side. Have one long sear pin that ran through all 3 rails (you would have to cut the slots out of the middle rail). Have the 3 sears welded solid to the 1 long pin and cut the arms off the outer 2 sears. Like this
                    damn great idea, but i am doing an inverted V,

                    im going to just se pneumatics up.

                    keep ya guys posted when i get ahold of a 3 body and another rail.
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                    • OPBN
                      OldPBNoob

                      • Sep 2008
                      • 5240

                      #11
                      Like the idea Flatliner. Even for a double barrel, a custom rail could be milled and and arm rigged to sit in the middle..... Hmmm.
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                      • OPBN
                        OldPBNoob

                        • Sep 2008
                        • 5240

                        #12
                        Like the idea Flatliner. Even for a double barrel, a custom rail could be milled and and arm rigged to sit in the middle..... Hmmm.

                        Kinda suprised no one has opted to make a small run of these.
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                        • Flatliner333
                          3X MOTY Winner :P

                          • Mar 2009
                          • 1286

                          #13
                          Come to think of it three rails side by side might not work unless you had a reverse valve on the left and maybe a capped classic valve in the middle and then there is the task of feeding the beast paintballs.....wait a minute ...you know what would be crazy...three different custom bodies(Karta/Ripper/Pheonix) with different barrels and anno it could be Hydra the 3 headed dragon and the most expensive Mag ever
                          sigpic

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                          • knownothingmags
                            RKM 3D Designs

                            • Apr 2010
                            • 4810

                            #14
                            Originally posted by Flatliner333
                            Come to think of it three rails side by side might not work unless you had a reverse valve on the left and maybe a capped classic valve in the middle and then there is the task of feeding the beast paintballs.....wait a minute ...you know what would be crazy...three different custom bodies(Karta/Ripper/Pheonix) with different barrels and anno it could be Hydra the 3 headed dragon and the most expensive Mag ever
                            i have all those bodies but ive got a diff tripple mag in mind. the setup i will go for is a pistol feed so small amount of paint for now.

                            more of a conversation peice till i get the mounting for 3 warps setup.

                            i could just do your idea of the hydras with my 3 kartas.? that would be funny.
                            what colors would be good for a hydra setup red, blue, green?

                            ,
                            thankyou for all the help guys,
                            oh and flat liner that is a great idea, wasnt trying to put your idea down, that is the idea iam doing for my dual mag.

                            that is my third and easiest project.

                            thankyou again guys for the help so far.
                            KNM
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                            Comment

                            • Spider-TW
                              U R techno-literate!

                              • Oct 2006
                              • 3554

                              #15
                              Originally posted by Flatliner333
                              Come to think of it three rails side by side might not work unless you had a reverse valve on the left and maybe a capped classic valve in the middle and then there is the task of feeding the beast paintballs.....wait a minute ...you know what would be crazy...three different custom bodies(Karta/Ripper/Pheonix) with different barrels and anno it could be Hydra the 3 headed dragon and the most expensive Mag ever
                              You might be able to angle tap the center valve. You just need to miss the feed through.

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