SCS Discobin

sillacsaurfang 2.2MiB Released July 21, 2025, 3:43 PM 0.100LBC 0 Reposts

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Odysee

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From the README:

This is a disconnector for a selectable binary trigger.

It uses an M16 burst trigger, m16 disconnector, m16 selector, 2 regular disconnector springs, and a custom cut disconnector. The third position of the selector disables the m16 disconnector, leaving only the custom cut disconnector which should slip before the trigger catches the hammer.

2 DXFs are included. One is a disconnector with only the spring pocket modified. It will function as a normal disconnector until you shave down the hook to "slip" early. The other is a pre-cut disconnector, though it may need modification as well. Different FCGs need to be tuned differently. My best results were from a pre-cut disconnector with the tip of the hook ground down slightly.

STLs are not included for a reason. Printed disconnectors work, but wear out VERY quickly. I'm not going to be responsible for you getting kicked out of your local range after a 5-round hammer follow burst hits you by surprise. Those of you capable of using the STL for something more productive will be more than capable of reconstructing it from the dxf.

For a more DIY approach, there are definitely printable M16 selectors out there, and you could make a DXF for the M16 disconnector to get that cut too, but I haven't tested other of those options.

I ordered my plates in Grade 2 Titanium (.040"), using a stack of 2 as my disconnector. I didn't need any kind of pin to keep the stack together. Stainless would probably work as well. AR500 would be nice, but I don't think you can get it thin enough.

Grinding down the rear of the trigger, where it interfaces with the safety, seems to widen the sweet spot a bit, but I don't recommend experimenting with this unless you really have to.

Important legal notes:

1. There is some grey area about how many machinegun parts it takes to call your firearm a machinegun for being "easily converted". Personally, I will not be putting this trigger in anything with a trip, let alone an AR-15, and I strongly recommend AGAINST even owning any other parts of the M16 triggerpack (sear, hammer, etc)

2. I don't mind if someone starts selling these disconnectors, particularly if they add value by packaging them with hammers they're pre-tuned for, but Franklin Armory will sue the shit out of them, and FA will win.

Known Issues:

1. An instant release of the trigger, rather than a gradual one, can sometimes result in semi-auto fire in binary mode. You can try to tune this out, but I recommend instead just adopting a rhythm with your trigger releases as steady and intentional as your trigger pulls. If you overtune it, you can end up with hammer follow instead, and you don't want that.

2. The fourth position should probably do something cool. It doesn't.

As always, build at your own risk.

LBRY Tags: 3d2a