This is how Kriss Vector .45 ACP works | WOG | with commentary

The Kriss Vector series are a family of weapons based upon the parent submachine gun design developed by the American company Kriss USA, formerly Transformational Defense Industries. They use an unconventional delayed blowback system combined with in-line design to reduce perceived recoil and muzzle climb. Type: Submachine gun, civilian carbine Place of origin: United States Designed: 2006 Manufacturer: Kriss USA, Inc. Produced: 2009–present Variants: See Variants Weight: 6 lb (2.72 kg) (SMG, SBR), 7 lb (3.18 kg) (CRB) Length: 24.3 in (617.22 mm) (SMG, SBR), 16 in (406.4 mm) w/ stock folded, 34.8 in (883.92 mm) (CRB), 26.5 in (673.1 mm) w/ stock folded Barrel length: 5.5 in (139.7 mm) (SMG, SBR, SDP), 6.5 in (165.1 mm) (Optional for SMG, SBR, SDP Gen II), 16 in (406.4 mm) (CRB), 18.6 in (472.44 mm) (CRB, Canadian version) Cartridge: 9×19mm Parabellum.45 ACP.40 S&W, 9×21mm, 10mm Auto.357 SIG Action: Delayed blowback, closed bolt Rate of fire: Prototype: 1,500 RPM, Vector SMG: 1,200 RPM, Civilian models: semi-auto only Effective firing range: 55 yards (50 meters), 70 yards (64 meters) with 16-inch barrel. Feed system: 9×19mm Parabellum: 10, 17, 19, or 33-round detachable box magazine.45 ACP: 10- or 13-round detachable box magazine, ~25-round with optional "MagEx 25+" extension (formerly MagEx 30) Sights: Flip-up iron sights and, MIL-STD-1913 rail provided for optics