I picked up a 469, & want to be able to cock the hammer back for a SA 1st round shot. In the past, I was able to find 2 5906 hammers to do this on my 3913, & 4516. But the 469 is a gen 2 gun, so I want a gen 2 hammer. Not sure if a 39, or 59 hammer is the same. Any out there? GARY