From my admittedly limited experience, Cylinder & Slide is a first class outfit. Bill Laughridge, the owner, has been chosen the 2005 Pistolsmith of the Year.
I checked their website and found this description of the SFS mechanism:
http://www.cylinder-slide.com/index.htmFast Reaction Time. The pistol is always ready to shoot and safe with a cartridge in the chamber.
The trigger always returns to the same position.
The trigger movement and the trigger pull remain the same for each shot as with a conventional single action pistol.
The trigger over travel stop improves the stability of the pistol during firing.
Three safeties, locking the slide, locking the sear, and locking the hammer, are all activated or deactivated in one operation.
The operation is simple and ambidextrous.
Low Price.
Thanks to the reduced size of the hammer, it is easier and safer to draw the pistol from its holster.
The S.F.S. kit drops into an existing pistol.
(
C&S has offered this item for several years now.)
I would expect a handy amateur, who has stripped and (successfully!) reassembled a 1911 or Browning HP could get thru the installation without too much trouble.