Unidentified black trigger shoe marked "C3 P"

Had the above mentioned trigger shoe come to me in a parts deal; has 2 screws on side.Maker unknown anyone might know what it fits or the maker?

Exterior width is ~.516, interior slot ~..258-.259

Thanks

Randy

Could be ACE #3

https://www.t-grips.com/printableversion.htm

Thanks. It looks like the ones in the picture only black in color.

Have to try to find a Kennedy dollar somewhere to check it - haven't seen one of those in a while!

The "P" might mean Parkerized. The original Flaig/Ace shoes were steel.

If you have a 3/8"-drive socket set, those are really useful as curve radius gauges. Measure the OD of the socket that best fits. The Kennedy half dollar specs are here.