The Steyr GB underwent many alterations during its production run, obtaining a history for itself as being a poorly-produced and designed handgun. Originally produced as the Pi 18, the pistol was designed around an optional automatic fire control system that could utilize an extended 36 round detachable box cartridge and be utilized as a submachine gun. When that idea came to naught, the design was picked up under Steyr licensing by an American firm in the United States of America named Rogac, Incorporated. Unfortunately, the pistol once again ran into some heavy operation and production issues, making the market for this sub par weapon that much smaller.
Ultimately, Steyr took back control of the series with a few modifications and extensive testing, showcasing it now as the more traditional Steyr GB in the hopes that it could still attract some market interest. Steyr GB would go head-to-head against the Glock 17 to fulfill the role of standard sidearm for the Austrian Army, though the contract was eventually given to Glock and their Model 17.
In all, the pistol overcame its early deterrent features to become a quite capable and respected handgun. Unfortunately for the GB (and Steyr for that matter) the market had already passed on the GB system.