Hi Sig Forum! Happy Thanksgiving Eve. I have a Matech BUIS I was taking it apart this evening, looking at what it would take to potentially Cerakote it, and boing the spring and detent got away from me. I had my hand cupped over it (should have used the ziplock back trick instead) so the spring didn't get to far, but the detent is MIA. Does anyone know what size the detent is?

That sucks. I have one that I’m not using, but after your story I’m wary of taking it apart to measure it.

What about contacting the manufacturer?

Hope you get it!