From what I saw of TLW, it's just being cocked via the hammer, but the striker is placed like the ones on the Rhino. I also saw no mention of Chiappa in your post, but it's entirely possible that I missed it.
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[quote]There are others as well which don't have hammers at all, and use a firing pin system instead (sort of like a Glock), which would explain how the weapons in Destiny are able to work, though not int he case of a barrel being misaligned with the cylinder. This is also unlikely because in those instances, the hammer would be superfluous. It has no purpose... which is obviously not the case in Destiny, as all of the hand cannons have hammers.[/quote] I never specifically named the Rhino, but that particular paragraph was based on that weapon.