Step 5: Trigger guard
I got a small bracket for modular shelving at the hardware store. I measured it against the handle some, then cut a piece off. From there I curled the edges in. I didn't want to have the corners where my finger would be, comfort is part of the design. Then I added two notches so it would bent more easily where I needed it, and curled it into the correct shape.
To attach it to the gun, I carved a notch in the underside, and along the handle so it would rest more easily.