If you ordered it from Brownell's, it's part of what was at least an ongoing problem. They've had someone putting the wrong parts in bags. The order filler then goes by the part description and # on the bag, and it goes out.
I have received spiral pins that were in bags that described the grip frame screws I ordered, and screws that were in bags that were marked as Ruger hammer plungers. The good folks at Brownell's always make it right once they are informed.