Correct, those are still "antique firearms" based on the fact that they were originally manufactured in or before 1898.
The modification applies to taking a percussion revolver and modifying it to fire modern ammunition.
A Colt Single Action Army, originally manufactured in or before 1898, but can fire modern, .45 Colt ammunition is still an "antique firearm."
A Ruger Old Army percussion revolver, firing loose black powder and ball or bullet via a percussion cap is an "antique firearm."
A Ruger Old Army percussion revolver, with a conversion cylinder installed, allowing it to fire modern, .45 Colt ammunition is now a "firearm" under the GCA.
Last edited by OldMaineWoodsman; 06/24/25 02:17 PM.