Sear spring mortise........HOW?

[TennBill2]

What a Mother! Having little in the way of exotic equipment, I had to figure out how to mill this little slot. Took a small..3/32(?) broken end mill, ground the broken part off, slowly (Boy, is that thing hard!). Chucked it in the lathe and with a Dremel reinforced cut-off wheel, I ground it into a tiny cutter. Put my 'cutter' in my flex shaft Dremel and Voila', cut the slot I needed. Works just fine for a little sear spring slot.