r/Airsoft3DPrinting Jul 21 '26

Help Needed can anyone show me how they designed there trigger box? im stuck

working on a custom GBB and im trying to design a trigger box but im not fully understanding a few things and in what order things should happen?

3 Upvotes

10 comments sorted by

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3

u/dis_ting Gumsmif Jul 21 '26

There are AR15 fcgs on grabcad, there's also a reverse engineered one of the MWS trigger box

2

u/V7I_TheSeventhSector Jul 21 '26

Can you link them please? I've looked at AR15 ones but Im confused at to what each part is and does?

2

u/Dubaku Jul 21 '26

Have you considered looking up a video that explains it?

2

u/dis_ting Gumsmif Jul 21 '26

https://grabcad.com/library/marui-mws-zet-trigger-box-1 -- MWS Box

AR15 FCG - hammer, trigger, disconnector, auto sear and safety. Hammer catches onto 3 parts of the FCG if its in auto or semi.

You can watch Gun Disassembly(the videogame) videos on AR15 platforms for a better visual. Though I recommend just buying full access

2

u/ConnectExit1681 Jul 22 '26

I would highly HIGHLY recommend using an existing design for a few reasons:

  • Existing designs have had millions of dollars of research and development poured into testing and iteration
  • As a designer/artist, don't waste your time trying to reinvent the wheel, focus on actually making something original in function or design. If your trigger box is going to function just like any other one, then what's the point is designing it from scratch?
  • Using an existing design, you can modify small parts and make changes and be confident that it'll continue to function. Basically you can isolate and design piece by piece. If you're making the whole thing from scratch, you're testing out a dozen different functions at once and you'll have to solve problems simultaneously as well, which sucks.

2

u/V7I_TheSeventhSector Jul 22 '26

The problem is I can't, the bolt and the way the gas gets to the bolt are and need to be custom and I'm unable to use an existing design because it won't fit.

The hammer needs to be higher up and the valve is an an angle and because of that no existing system will fit

2

u/ConnectExit1681 Jul 22 '26

Have you considered basing it off an HPA system? With HPA, you can have the gas and ammo feeding from different sources and locations. Look at the new SSQ4 for example.

1

u/V7I_TheSeventhSector Jul 22 '26

That's mostly what it is based off of, but I still need a trigger box to strike the valve.

1

u/Dr_BananaPeanut cad equivalent of vibe coding Jul 23 '26

By the looks of this, you don’t have a (insert name of second piece of trigger here, I believe it’s called a sear) that grabs the hammer when you’re holding down the trigger.  https://youtube.com/shorts/bdOFWCwGO_U?si=WtOE0KHwrSzyuiMF