A two-tone FINISH gun rather than a two-tone color: IonBond frame under a Cerakote slide, all black, regular production. Colt reportedly made only a few, and only one example has been observed. Whether the slide is truly Cerakote or IonBond resisted determination even with an example in hand; the honest answer is that the frame is settled and the slide is not.
| Roll mark | M45A1 |
| Production | Regular production |
| Finish | IonBond or Cerakote (suspected) |
| Colors | FDE frame / Black slide |
| Pistol box | Blue Clamshell |
| Shipping box | None |