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The top strap on a revolver is the part that goes over the top of the cylinder as you can see on this picture of an 1858 Remington. Image Source For comparison, here is a picture of a 1851 Navy...
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The top strap on a revolver is the part that goes over the top of the cylinder as you can see on this picture of an 1858 Remington. Image Source For comparison, here is a picture of a 1851 Navy...