sentences:  Calibers such as .22 LR, .40 S&W and 9×19mm Parabellum were mentioned when the gun was first released.The Gen II versions with multiple design changes including a new 9 mm variant were confirmed at SHOT Show 2015, though the .22LR version had yet to materialize and was thought to have been canceled up until SHOT Show 2020, when they announced its release.The original .45-caliber Vector was designed to accept standard Glock 21 pistol magazines.