This is a slight modification to the sear in Captain Slug's Caliburn. I've never read of Caliburns having catch issues with a fresh default sear, so it's entirely possible this modified sear only helps in my specific Caliburn (has some custom work done to it). Just in case anyone else is having catch issues with the default Caliburn sear, I thought I'd upload this.

In the image, the stock sear (orange) is laid the modified piece included here (grey). You can see how the modified sear adds a bit of material to change the angle of contact between the sear and plunger. Note that this absolutely increases the trigger force required to fire over the default sear, but for me it was this or no catching whatsoever.

So basically, if the default sear works for you (which it probably does based on my research), ignore this file.