There was only 2 sleeves, but they were both the same internal diameter. In the older style, the slot where the cocking piece pin slides was cut out all the way, as you can see in the picture below. I think there might be something else going on with yours. The the sleeve you received have residual metal flashing on the inside where the cutouts for the indents were made? Pictures of your sleeve & cocking piece together would be helpful.
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