Check here: http://www.rugerforum.com/phpBB/viewtopic.php?t=67314 where I posted a similar same question. As for how it's implemented (pictures of parts, etc), I could suggest going to Ruger's site and downloading the manual for one of the 50th Anniversary guns (or the new .44 Special Flattop) and see if the schematic/IPB has the info you seek.