The Steyr GB service pistol was designed for the Austrian Army, using a gas delay system very similar to that of the Volkssturm Gustloffwerke VG1-5 rifle.
The new model has been requested by our user: Steyr GB pistol The GB is a blowback-operated, gas-retarded blowback semi-auto pistol. It uses some of the hot powder gases, feeds from the barrel into the front part of the slide, to slow down the retraction