I don't think they're a drop in part and it may not index correctly (be out of time) in a revolver other than the one it was made for.
I'd say about 90% of the time they drop right in. I've gotten a few off of ebay and they all worked well in numerous samples of the single six...
ebay for a revolver cylinder? Far out.
Make sure your over all length is the same or longer on the cylider you are looking at to purchase. If it is short you could use shims but they are a pain.



























