Here's what a search turned up..
Big Lou is correct that they offered them in the standard 15 round & compact 13 round..
"92SB (92S-1)
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.
- 92SB Compact (1981 – 1991), shortened barrel and slide (13-round magazine capacity). It was replaced by the "92 Compact L".."