Hi Clair, the top rib was a floating vent rib installed after I returned it as best I know. This is the top of the M21 that Daryl H. posted, the one with the Winchester horse and rider, which was a gold inlay. I posted the top mainly for the 20/28 gauge markings on the barrels...rather rare as it is the only 21 ever made that way I was told.


Sam Welch