The Speed-Six was non-adjustable sights and round butt. The Security-Six had adjustables and a square butt.
I've got a Security-Six that started life with a 6" barrel. Had a gunsmith cut it to 3" and "round butt" the grip frame like the Speed-Six, and put a set of Pakmeyers on it.
Sure made a great gun out'a it! <img src="/ubbthreads/images/graemlins/cool.gif" alt="" />
The GP100 comes with a 3" barrel as an option, although in non-adjustable sights.
Virgil B.
