Steyr GB Barrel
grabcad
Accurate model. Only missing threads on outside back of barrel for mounting to pistol and rifling inside the bore.Steyr GB is a gas delayed blowback pistol.This is accomplished by using the fixed piston formed by the outside of the barrel, inside a moving cylinder formed by the inside of the slide, gas pressure in the space between them opposing the rearward motion of the slide until the gas pressure has declined (at which point the bullet has left the muzzle) thereby allowing the slide to continue its rearward motion..
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