I pulled my Colt Navy out yesterday just to look at it and the cylinder is in really bad shape. Thought it would be difficult to find a replacement for it but I've actually found several. My question is, how do I know if this will actually work on an original or not.

Numrich is calling it an (F Frame). What does this mean? Is it for a modern Colt pistol or original? Kind of looking like this is for a 1958 version of the pistol.

Colt Black Powder Revolvers | Gun Parts

Dixie Gun works also has one they claim will fit on several versions including the originals but they are out of stock at the moment.

I don't want to spend $100 on something that won't work.
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