Here are the real steel differences:
The extremely rare 92SB, Initially called the 92S-1
, was specifically designed for the USAF (US Air Force
) trials (which it won), the model name officially adopted was the 92SB
. It included the changes of the 92S, added a firing pin block (thus the addition of the "B" to the name), and relocated the magazine release catch from the bottom of the grip to the lower bottom of the trigger guard.
The FS has an enlarged hammer pin that fits into a groove on the underside of the slide. The main purpose is to stop the slide from flying off the frame to the rear if it cracks. This was in response to reported defective slides during U.S. Military testing.
To determine what the KWA M9 PTP was designed after, we'd have to ask Radix- or Allizard. I'm sure the M9 PTP design is a combination of the most common M9 configurations.
Back on topic... after looking at the various models... disregard what movies the gun appeared in... I would have to say the gun is modeled after the FS, because the SB seems to have thicker grips while the FS have slimmer grips. Here's the page I was looking at:
I'm curious as to which version the M9 PTP replicates as well...