I had never heard of the 646 either until early 2008 I was browsing a gun show and came across a .40 Lframe. Without even questioning what it was I picked it up for $475. It had the aluminum case and all paperwork. The only flaw on the gun was someone had stippled the backstrap. Ohhh well I love it. I would buy another in a heartbeat if I came across one for a reasonable price. I modified some targets to fit the round butt.