RETIRED: merged into variation 16. The split was based on a GunBroker listing description; extensive review found no examples with differing checkering row counts.
| Roll mark | M45A1 |
| Production | Colt Custom Shop |
| Finish | Cerakote |
| Colors | Grey frame / Black slide |
| Pistol box | Blue Clamshell |
| Shipping box | None |