Hi Douglas and welcome. No, it is a custom color finish frame and slide with specialized engraving. It is not a black then cerakoted finish. Cheers, stay safe and enjoy!

The finish on a Glock G43 Gen 4 Revolution Engraved "Colonial Brown" 9mm Semi-Auto Handgun is a "melonite" finish with a custom engraved pattern and a brown color applied through a specialized coating process; essentially, it's a standard Glock slide finish with a unique engraved design and a brown color added on top, giving it the "Colonial Brown" appearance.
Key points about this finish:
Base material:
The slide is made from steel and treated with a melonite finish, which is known for its durability and corrosion resistance.
Engraving:
The "Revolution Engraved" part refers to a specific pattern of engravings on the slide, which can vary depending on the manufacturer.
Coloring:
The "Colonial Brown" color is achieved through a specialized coating applied over the engraved surface.

Hi Douglas, it is not a cerakote. This model features a distinctive Colonial Brown finish with custom engraved grips, showcasing the "Revolution" theme.
Stay safe & have a great day!